to be fair, that is actually bigger than the dog crate Indy used to spend his nights in until he was 100% reliable with the dogs and vice versa, Misha also spent time in the pen. But then again they were both tiny kittens, under 4 months when they were in there! with litter tray, shelf and food/water (on shelf away from litter tray)
I could see that things uses if it was a reasonable price (ie rescue kittens/kittens on cage rest)
but the price is ridiculous and is too small for an adult cat