Yeah I have this site open too, I'm deciding between the three.
I only have 1 snake that I keep in a 20gal tank if that makes any difference at all.
I really like this one since I can open the top to see inside without bothering her. The only worry I have is that even on the large one the entrance hold looks pretty small to fit an adult through.
At this point I just want to buy 2 hides that will be big enough for an adult female BP. I find that the exo terra hold in heat/humidity pretty well, do the black box hides do as well?