I purchased two of these and put them up together to create a lovely large play space outside for my house rabbit. Her personality changed; she became vibrant and ran around in circles, hopped up on things I placed in there. I've since bought a couple of plastic tubes for her to run through, I've positioned an old piece of wood, perhaps shelf remnant, on an old plastic box to create a bridge which is her favourite spot, and bought one of those wooden hen house box things to go in which she also likes to jump up to sit on. The only problem i've had is when placed in our front garden, she did attract the attention of cats, Since placing her in the rear garden cats don't seem to bother her anymore, however I am planning on making a chicken wire cover to keep cats out when the weather warms up again and there are more of them about. I don't use the tiny door to enter the run and instead unlatch two panels, the little door is big enough for my toddler, the design could perhaps be improved in that regard but so far it has worked fine and its the happiness of the rabbit and her quality of life which a product like this is about really.