Does anyone here use cages from Animal Plastics? I have some questions.. the first being are they worth the price?

Is the uth source built right in? Like you plug in the cage itself (to the thermostat I mean)?

Do they hold heat better then a sterilte or rubbermaid?

What, if any, is the benifite of getting one of these over a regular sterilte?

I'm asking for when Hydaya gets bigger of course, right now he's just fine in his sterilite, but when he's full grown I might invest in one of these.

Thanks for any help!
Lira