very useful to isolate cat when i need to do and i do not feel guilty because everything is contained ...... i worried because some reviews reported ledges as flimsy ..... well, my vet pointed the cat i had was teeny (about 5#) so this crate/playpen would not have to HOUSE A MOUNTAIN LION ,,,,, in which case the playpen would be quite flimsy ....  however, it is quite sturdy and safe for containment of regular house cat .... my only problem is that it was quite heavy/awkward for me to put together by myself so i had to get help just to get it into the house as the package was quite heavy (i am a small woman and weigh 78#) .. overall, i am happy with purchase .... i do wish it was a bit longer though as i have to put manual litter box in it as automatic litter box is too big .... reason i need automatic litter box is that cat will not bury his "stuff" ...... oh, price was right too