X2.
I tried these out (and/or other similar style "racks") for different species of terrestrial geckos. They constantly would escape and would be behind or next to their cages, but still inside the frame of the rack. When I opened the drawer to look for them, they would crawl through the hole underneath where the tub is when it is closed, and hide underneath their cage. If they were on the bottom, they could climb out from underneath the rack by going to the back end, where there was an opening.
Also, others would climb out of the back of their cage while the tub above was opened.
I found all of the geckos, but it definitely wasn't worth the inexpensive price... Way too much hassle since it was so easy for the geckos to escape.