I am not near you (SW Florida) but have a Summit on a 2015 Tundra. I purchased it in March of 2019 and had it installed at the factory in Prescott, Az. I usually carry a lot of gear but still find it usable to get out of the rain for short periods of time with my wife. I would not want to be in there for any extended period of time. We carry other outside tents/shelters in case of extended wet periods.
The structure itself is built very well, quality fittings and nice welds. We have had some tent leak issues that AT has tried to fix. They replaced the complete tent fabric after I returned to the factory with a new and improved tent. It still had some leaks after the replacement around the lower windows that continued to leak until I sealed them with some sort of silicon looking seam sealer called Gear Aid Seam Grip which AT provided. I was disappointed that I had to seal a new tent, I have never had to reseal any of the North Face or other tents I have owned. I also had issues with the Nemo awning, the inside waterproof coating started to peel off after a 3 or 4 months. AT sent me a new at no charge to me which also started to delaminate after a shorter period of time, suggesting I put it away wet or the humidity of where I live was the reason for the issue. It was never put away wet and yes it is humid here in Florida. None of my other outdoor gear has ever failed like the Nemo Awning did. AT has been stellar at trying to help me and has offered to give me a full refund on the awning, I may try other ways to make it waterproof again as it is well designed to fit the topper. I do believe it was designed for the Habitat and not the Summit.
I have 200 watts of solar panels and have carried a couple of bikes on the roof with no issues lifting it up. I do use a support rod to lock it up incase high winds occurred but probably not needed the way the gas shocks are positioned.
I have the optional insulated wall liners keep the heat in nicely and also keeps the cool in nicely when I attach my air conditioner to it for hot summer nights. I opted for no windows or roof openings from the factory, I have installed a small round powered roof vent. I created a screen wall that allows me to keep the rear lid and tailgate open when the weather permits. I have also had a awning made of Sunbrella material for extra shade on either side of the topper.
My wife and I have spent a lot of time in this Summit and are happy with our purchase except for the mentioned issues. We would probably purchase another one knowing what we know now.