I have an Animal Plastics 9-slot 1755 Sterilite rack. I love it! It's build incredibly well is and has remained very secure and stable. I ordered mine with the caster wheels and belly heat, in black, if that matters at all. The router grooves in the sides and the actual shelves are nice to keep from tearing up the Flexwatt plastic coating and have a little lip on both sides to hold the Flexwatt in place with only a piece of tape at the start and end of the tape. They also have a precut hold in the back panel for a thermostat probe and a channel in the shelf to lay the wire for the probe.. Mine has held up extremely well, holds humidity and heat with no issues and if you follow the assembly directions they're nothing to put together and hold up very well.