I bought the StowAway MAX Cargo Carrier ($760) for my X to go on a road trip from the LA area to the Colorado river in Laughlin, recently. I was a little worried about how it would work out, so I thought I'd share my experience here (which was good). It holds 16 cu. ft. andup to 200 lb of luggage inside. You can get the version of the carrier that swings away from the car (which I did). Makes it easier to load stuff into your trunk with the carrier attached. However, I was able to open and close the trunk, even without swinging the carrier out of the way. You will likely need to have the full tow package installed, as the carrier itself weighs 94lb, and with it fully loaded, you're talking about holding up to 300lb of tongue weight. I believe that is over what the "accessory hitch" is able to handle? The carrier comes with an electrical connection for brake, left/right blinkers, but is in a wiring configuration known as "4 flat." The Model X electronic connection is what's known as a "7 way round," so you'll need an adapter. I used this one for $8. The carrier comes with a standard bolt to hold the carrier safely on the X's tow hitch, however if you're planning to leave the carrier attached during your travels, you'll probably want to do what we did, and spend $20 to get a receiver lock. My primary concern was whether I would have a hard time Supercharging, due to the increased depth. My route to Laughlin was set to take me to the Barstow and Needles SC. Barstow has 8 stations, 4 are pull-through, and 4 are back in. We arrived here, and were able to use one of the pull-through spots, so no worries there. Needles SC was a bit scarier, because I couldn't really tell from the photos online whether or not the SC cable would reach, but we had no problems! On the way back, the X took us on a different route, going through Primm, NV instead of Needles, and then back through Barstow. Primm, like Needles, only had back-in stations, and when we got to Barstow, all pull-throughs were taken, so we had to back in here as well. In all 3 locations, we had no problems backing in to charge! Forgot to snap one on our pass back through Barstow, this is Primm: I can't guarantee it will work at all SC, I could see where it might be difficult if the Tesla parking sign was too far forward or something, but one other option you might have in that situation would be to have a passenger swing the carrier out completely, opening up more of the rear/center of the vehicle area to allow for backing in further. We didn't have to do it this trip, though. Hope this helps.