I ended up moving from these seats because it was kind of tough to see with everyone standing. I thought being on the Floor would be something special for my first time, but it really wasn't. I'd rather have an actual seat with a side view and some more elevation.
My seat was 52, which was all the way to the left as you look towards the stage. I did like being on the aisle because it made getting in and out a breeze. And if I wanted to get up and bust a move, there was plenty of space. But Row 15 was pretty far back, especially when you consider that Floor 3 is the last of the Floor sections.
For a concert with a lot of energy, it's probably worth being on the floor just for the atmosphere, but I'd rather have a better view of the stage with fewer people in front of me.