I had an escape from a 20-L Critter Cage: I wasn't in the habit of pinning/locking the lid to the lip on the cage and I may not have pushed the lid all the way into place, or the snake may have been able to push a corner open. I still think they're a good choice, but I now always pin them shut.
I use that tank, and for my needs it works very well. The click does get rather annoying, and if you set anything on the screen and try to open or close it it makes an annoying sound.
Stinks that at my local petsmart they cost $60 :uhoh:
Did you not read the thread?? The click lets you know that its locked. This is the best part of the cage..
The sound is less annoying than your posts.