I've typed up a long ass thing on these before (I searched the Kingsnake Forums for my original post, but no dice). They look so perfect don't they?? Pre-built... cheap... I always catch myself at Wal-Mart or Target, re-checking them over. But quite frankly, I would never ever use them to house any of my snakes. I mean, if you can figure out a way to make them work, or your crafty and have the ingenuity to alter it, please share!!
Next time your staring at these drawers... pull out one of them half way, and reach your hands upwards towards what would be the "roof" of the drawer space, aka what your snake would stare at if it looked up. You'll notice that the plastic bases are really jagged and uneven. Where the top of the bin should meet the ceiling, there are gaps... two centimeters are more. To state the obvious, I have seen crafty ball pythons get through much smaller. They're not exactly that snake safe... try it, just feel around real good. Additionally, all those spaces really are going to be hard to keep humidity up... wayyy to much airflow, which will also make your thermostat run double time.
Lastly, they're not sturdy at all. If you put one of those on a level floor and gently push the top of it, it WILL lean. There are the stackable kind too, and if you get a stack high enough to your waist, you push on it, it WILL lean and it WILL give.
Bad idea in my opinion. I really wish I had the old post, I went into more detail... but for lack of time... I hope this helps.
P.S. The supportive structure is hollow. One of my snakes escaped one day and crawled up the tubing of one of these I had sitting next to the rack for storage. It took Frank using a saw and me FREAKING OUT to get him out.