I have some older Boaphile hatchling racks I picked up used, and the bins are very fragile. (I understand those bins are no longer available, so I can't replace broken ones, either). They crack and become more fragile over time. I prefer Sterilite tubs.

I have a BUNCH of Animal Plastics racks, and I am very happy with them. They're sturdy, easy to clean, and hold heat well. The economy racks are VERY economical. You do have to be careful of the new shelf fronts, if you drop a shelf or something while assembling or cleaning it, and it hits something hard, the corner may snap off. This doesn't affect the functioning of the rack, though. (Happened to us just once).

AP also has phenomenal customer service.