I had my P85+ "PhotoSync-ed" last week and wanted to share my experience. Like some others on this forum, I had it done at Premier Protective Films Int'l in Fremont and I can't say enough of how friendly the staff was to deal with, and how they really made great efforts to educate me on PhotoSync's capabilities. They have a small heat lamp setup to help demonstrate the heat-rejection properties of PhotSync - they let me put my hand under the heat lamp, then blocked the heat with a piece of glass tinted with different levels of PhotoSync (and some other products on the market) so I could feel the difference...and it really is a huge difference! I was also impressed with how up-front they were with as couple of the things some folks see as "issues" of having PhotoSync, such as the rainbow affect on the windshield when wearing polarized sunglasses and some glare at nigh-time through the rear window on the defroster lines. Overall the staff at Premier were great and I'd give them an A+.
Quick background on my car/personal specifics: My P+ has the flat-white exterior, but I have the black interior so it heats up pretty quickly. I live in the San Jose area and have two kids <5 and have the rear facing jump-seats so it was important to me to get darker tint in the rear of the car.
Here are the levels I had done:
Windshield: 75%
Front Side Windows: 65%
Rear Side Windows: 35%
Rear Hatch: 35%
Pano Roof: 75%
(I went a bit back and forth regarding getting the pano tinted at all, but I am bald so figured it'd probably be a good idea - and I'm glad I did!)
I can say after a few days of driving that PhotoSync has made a huge difference. Generally it has been pretty hot in the Bay Area lately (80s/90s). This past weekend our family went on a couple of outings where we left the car outside in 80+ degree weather, and when we came back to the car, it was noticeably cooler than it was before getting PhotoSync. Sure it was still pretty hot, but it wasn't nearly as hot as it would've been before. And of course this means that to get the car cooler it will not have to use as much battery power, therefore preserving range. I also once used the mobile app to pre-cool the car, and noticed that the beginning temperature was around 80 degrees inside the car as opposed to the 110-115 it had been a couple days before in similar weather. I also think it looks really sharp and adds an element of privacy for the rear of the car. I wear polarized sunglasses so I have noticed the rainbow affect on when looking toward the top of the windshield, but it doesn't bother me at all since that's not where my focus is when driving (nor should it be for anyone!). So I think generally it's a total non-issue. And I barely even noticed the glare in the rear windshield defroster lines at night - if they hadn't mentioned it to me beforehand, I don't think I would've even noticed it at all. So overall I'm extremely happy with the product and give it an A+ too.
Finally, slightly off-topic from tinting, but something new that Premier is also offering now is a Glareshield for the big touch-screen. When I first took delivery of the car and started playing around with the touchscreen, I noticed that the screen really is quite a fingerprint magnet. Tesla provides a cloth to help wipe it down, but it's a little inconvenient to use it all the time. I didn't know about the Glareshield when I went in for my tint appointment, but the folks at Premier showed me a car that had it done as an example, and I thought it looked pretty good so decided to have them install it (relative to tinting the rest of the car, it's very cheap at about $60 installed). After using it for a few days, I'm really impressed by it. It definitely reduces glare on the screen and it make a huge difference with regards to fingerprints. It's kind of like the covers you can get for a smart-phone, which I've always used. The screen still responds exactly as it should when touching it. Glareshield gets an A+ from me as well.
So if you're thinking of getting your Telsa windows tinted and live in the Bay Area, I would highly recommend getting PhotoSync and Glareshield at Premier in Fremont. And even if you don't live in the Bay Area, I'd say it's worth the drive (who wouldn't want to drive their Model S around more anyhow? Seems like a good excuse for a road-trip to me!).