Has worked out very well for our old, stray  female cat (whom I cornered and put in the "kitty condo") , who actually likes the security of this pen with 2 good meals per day, fresh water, fresh cat litter and play time twice a day.  She loves going up and down the "plank."  Am keeping her here kind of "in isolation," until I can get her to the vet for all her shots, deworming, treatment for mites, etc. (If, I succeed in getting her in the cat travel bag.!!)  Also, this way our dog can slowly can used to her presence if we should eventually decide to bring her in the house (after vet's approval).  All of this work takes "baby steps" with half-wild cats.  After feeding her for 5 years in the backyard, it took me so long to just train her to come to me (so I could put on her Frontline flea treatment!  So, this "Cat Run Playpen" or Kitty Condo, as my husband says, has been a HUGE HELP!!