Great size, needs filter cover and improved clips
The box itself is great, the size is enough that my big Maine Coon boys can use it easily and the depth means no leaks. Comfortable handle, too. However, the first time I picked it up with litter in it the clips gave way and the base crashed to the floor - fortunately it happened immediately so that wasn't any great distance! I bought mine a few months ago and I notice from the picture that there are now four clips (mine has two) although they are still the easily broken ones as far as I can see; the makers should look into the foldover ones other trays (and carriers) use that are much better. I now have a bungee cord holding the two together so it can be lifted safely. Also, as everybody else has said - the filter needs a cover.