This is a beautiful bed, especially for the price. I think the full size bottom bed will be great when my son (now 6) is a little older and no longer wants a bunk. One complaint I'd make is that, in my opinion, there is a significant design flaw. The bottom bed is strangely high off the ground, 12"+, and there is VERY little space between the top and bottom bunk. Not sure why they couldn't have lowered where the bottom bed is mounted, like a good 6" or so....it would make a huge difference.
All that being said, I'm able to comfortably sleep on the bottom (I'm 5' 10"). so, functionally it works fine, just not as good as it could be. I mean, how's a kid supposed to make a fort on the bottom when they can't sit up.