The sliding lock tops are super secure and a good choice for glass terariums. As long as you don't forget to get it into the lock position you shouldn't ever see any escapes. I have the 20 gallon slide and lock for my smaller normal now, but since we just moved our beardie I now have a free 40 gallon that I'm either going to move Kirby into or put a new lizard in.

humidity can be a bit of a challenge, but there are lots of ways to get around that.