I have a Habitat installed on a 2005 Toyota Tacoma. The Habitat came with the 12v power system, cab slider window, and interior carpeting as options. While I haven't done it, removing the Habitat on the Tacoma looks fairly straight forward. There are four large bolts on each side of the truck bed that secure the Habitat. The 12v power system has a quick disconnect. The top of the bed rail is not caulked. Instead there are three bulb seal gaskets that run the length of the truck bed rail, on each side and in the front. In my experience, with the Tacoma, these bulb seals did a great job sealing the Habitat to the bed with the exception of the front corners of the bed. In the front corners of the bed I ended up running a six inch bead of silicone on the bed rail to prevent water from getting under the bulb seal through a small rectangular hole (OEM) in the bed rail.
As far as the Nemo tent. I was one of the unfortunate ones to get a tent that was not seam sealed properly. AT Overland told me that this was an issue with a small batch of tents, and AT Overland ended up fixing the seam sealing for me free of charge. I received the Habitat four months ago so I would imagine that poorly seam sealed tents is no longer an issue.
If you have other questions or would like images of anything feel free to send me a message. I've actually been on the road traveling and living out of the Habitat for the past four months so I feel like I know a fair amount about it at this point.
