I don’t understand the negative reviews. You need to understand what you are getting before you give this bad marks and compare it to other similar products. I have a small rabbitry and these units are perfect for me. First, the price. It’s advertised as a starter kit and includes a water bottle and feeder. Even without these additional items, a comparable individual stacking rabbit cage costs around $90 to $200. Is the water bottle crap? Yes! It definitely is! But who cares? You just saved $30 and still got a free feeder that works perfectly. Buy a RentACoop water bottle and move on. As far as stacking, the listing states to stack 2 at most but you can easily stack 3. Please be advised though that once they are stacked, they are merely “linked” on top of one another and not attached. If the top cage is lifted or adjusted in any way, it will most likely detach from the rest. You’ll need to zip tie. The pee pan. It’s huge! It’s very deep and could hold a lot if u let it. The first day I put a layer of pine pellets in the bottom and that could have lasted a week (but I only went 3 days). After that, I decided to just try spraying them off with a hose everyday and that worked best for me. Because the pans are deep and slide out easily, carrying the pan outdoors to spray with the hose for 20 seconds (for lots of bunnies) wasn’t bad at all) and boy does their house smell great. Plus, no more buying pellets. The other thing I’d like to mention is that they are VERY easy to put together. Remove from box, unfold the wire (if it is stuck, find the prongs stuck in the middle and detach - that’s your culprit). Attach bars with bolts, then sliders for tray, and that’s it. This unit comes with what you need to stack. It’s 4 little rectangle things that come already attached to the bars. Just pull them off the bars until you’re ready to use them. All in all, I’m very happy with my purchase and plan on buying more. I have a single pet free roam bunny that I keep in my house and I’m going to get one for him too just because this pan is so much easier than even a litter box. I hope this helps!!

this updated design makes the cage sturdier but now the pan doesn't catch the corners of the cage!