Welcome to Tesla, glad you are enjoying your X. Coming from having Mercedes and Jaguars my whole life once I drove my first Tesla in 2012 I never looked back.
While a rather early review, here what I find on the 2020 LR+ cars. Good: Panoramic roof blows your mind. Massive center display is massive, and nice. Quality of Rear Camera is A+, I've not seen a car with a better one. Being able to drive with the Rear Camera displayed is superior to Digital Rear View Mirror technologies. It a better image and easier to focus on. Tons of cargo storage everywhere, frunk is large even though AWD, and it has a 5000lb hitch. For many people this can replace a pickup or truck frame SUV. Homelink is easy to setup and works very well. Other mfrs should pay attention. Driver's seat is roomy as are all other front 4 seats. Infotainment system has good response time. Comfy suspension has adjustable ride height. TACC is among the easiest to use among all brands. The "default set speed function" is great. Autosteering is good, easiest to use among popular brands. Falcon wing doors are useful and an attention getter. TeslaCam and Sentry are good. More mfrs should pay attention. Tesla staff really knew about the car functions, which all other EV makers need to address. It's sad when a new buyer knows more than the staff does. Family LOVES this car. Wife wants to steal it from me, unlike my other EVs. Needs improvement: Insufficient number of USB ports which happen to be old school 2.0's. No USB-C or 3.1 Fast Charging ports. 2.0-only is >10 years old. 3rd row seats are not for tall people unlike other 7+ seaters. This is a 5+2 car, which is still champ of EVs. Interior sound levels at 70 mph are higher than average, not just highest in it's segment. Static losses while parked are the highest I know of an EV. Needs an easy fob-based "Lock Tight" function so walking by the car won't trigger it. They aren't the only culprits, this is all too common now. But the Tesla fob will actually open doors over 25' away through a wall. Rear seats need some kind of storage. Center seat should fold down for 4 passenger comfort. Software still has bugs. I have had to reboot computer 3 times so far in 2 weeks because functions have locked up, including the Owner's Manual, and Charging menu items. Sorry, I forget what the third reboot was. Regen is derated under many mild driving conditions even below 50% SOC. 60-70kW is not that much today, but often you don't get that. Owner's manual needs an update to the update. Does not accurately reflect the hardware that ships with the car. Initial quality rates a C. Paint damage and incorrectly installed/fabricated truck storage bin. Buying experience was clumsy. Delivery day instructions were good but too rushed. Never say to a buyer - "Sorry, I'm out of time for you, go home and enjoy." This occurred after 20 minutes of inspection and orientation. Not wise on a car as different as a Tesla is. The 351 mile range indicator was not correct as sold. Four Tesla staff said it was correct as did the website. It was ~290 miles on delivery day. Overall: The handling is good for an SUV. Ergonomics are good. Family Factor is A+. We are very happy with the car as a family. Needs some spit and polish. Oddly the areas that could be improved are in general cheap fixes. I really need to do a long family trip to fully evaluate it. But happy family in a Green Car is what it's all about in a family car.
On the Good section, I didn't see any reference to the increased range, specifically in comparison to anything else in the market.
I have not been able to fairly evaluate the range yet due to rain. Rain gives poor readings. My initial experiences would point to 290 miles of real world range. I might try tomorrow to get a more detailed read on it. What it has to beat is the Jaguar I-Pace. It should easily beat that even though the I-Pace has been boosted to 258 miles (not filed with EPA yet). The Hyundai and Bolt do not count since they really aren't nearly the size of the Model X and do not offer AWD or towing. And the MX would spank them and put them to bed without supper in a passing distance contest.
Finally did my first range test. Conditions: 50-60°F, I did not need the heater or AC. I had preheated the car and charged it to 100% or 352 mi indicated. It is 4 miles to the freeway. I drove until ~56% SOC, then turned around without stopping and took the same route to eliminate wind factor. Wind was very light. Used the Interstate 15 from Corona to almost Baker, California. Terrain involves a climb of about 3600 feet, but it occurs both ways. Used TACC and Autosteering. Normal driving mode. 45 psi cold, 20" wheels. ~270lb of total cargo. Hitch was mounted, nothing on it. Car/tires had ~250 miles on it. Freeway driving was set at 75 mph, but had to slow to 70 mph at times, and had to pass at 85 mph a couple times. Pretty much like I drive in a 70 mph zone when I am not in hurry. SOC start 100%, SOC end 14%, consumed 78.3kWh. Miles driven (odometer) 229.3mi 3h14m 342Wh/mi = 266.6 miles drop dead range @ 75 mph. Battery holds 91 kWh. Review - The Range estimator is basically a voltmeter with a table corrected to 100% = 354 miles maximum charge state. At 50% SOC it reads 177 miles, etc. Never trust it. It does not learn at all from what I can tell. ie - 20 miles indicated is not based on current driving efficiency. Some people are going to be disappointed with the EPA range claim. You will have to drive slower than 75 mph to get over 300 miles out of the car out west. It does have more range than any SUV style EV, but do not plan based on 351 miles. It does not have 100 mile of extra freeway range over it's competition. Is it really more range than the early Raven Long Range model? That I cannot tell you. Sidebar - IMO the seat is a "Good 2h" seat. Not a "Great 4h" seat. Spotify locked up after I left the urban area, but still with 5 bars of LTE. Bug or bandwidth? I don't know. Since AM isn't available, always keep a Music USB handy when travelling cross country.
And why is this a new piece of information?. The EPA range is NOT at 75 mph. It is a steady state 65mph with a mix of urban driving mix on good weather conditions. I am guessing, you will get to 300+ miles on a nice 75F weather with light to no wind and not much elevation changes at 65 mph.
Sorry I missed this. My other EV hits 90% of EPA listed range under the same conditions. Not saying good or bad. I'm saying what I found as a neutral observer. 266 miles is not bad. Further than any other brand.
OK, I am new to the forum, we recently took delivery of a Model X long range, and I am loving it. We drove McKenzie pass, Oregon yesterday to the top and back down. It goes from 1500 feet to 5500 feet elevation in less than 20 miles. I loved the way it went up a steep grade at any speed I wanted, it cornered very well. No reduction in performance at elevation. I had 195 miles of range left when I got to the Dee observatory on top. On the way down, I was amazed that my range was going up, drove 20 miles down, and ended up with 202 miles of range at the bottom, very nice. I have had good experiences at superchargers and home charging. I am reading lots and learning lots. We had wanted to buy an S but after driving both, we wanted a bigger interior, and to be up a little higher. The windshield in the X sold us. Now I hope I don't encounter a rock off a gravel truck any time soon. That view through the old-growth fir trees was amazing!