I had one of these for my lizards. They liked to peek out the top hole to see if the coast was clear. I used this on the cool side of the tank to offer them a place to hide and to keep out of the heat. I would not put this under a heat lamp. The hole in the top would let in a lot of light and heat. And could create an oven effect inside the hide.

Pros: offers a place for your reptile to hide

Cons: difficult to clean

My rats love things like these! They can hide in them whenever they want to be alone. It's hard to clean though and with a rat, everything gets dirty.

Pros: nice place to hide

Cons: may be hard to clean