It was an easy-ish install. Any 4runner that didn't come with a deck likely wont have the holes needed to bolt a deck to. To solve this, I had to put the deck in as it would sit, mark holes and drill through the floor. I treated the exposed area with some rust stopper paint. 24+ hours later I installed the deck using washers and ny-lockers, maybe even locking washers. All stainless as I live in the rust belt. Believe drive side bolt was easily done solo but the passenger side is a lot easier with another pair of hands to help. Then I sprayed more rust stopper paint. After it dried I sprayed with another rust protector.
I use it, but I also followed a thread on the forum to build a deck for sleeping on if camping out of the 4runner. That deck is pretty awesome. I take it out frequently, and will raise or lower the deck and use that as well.