I received this cage as a Christmas gift from my Sister who meant well but unfortunately it didn't work out. The plastic on this unit is very lightweight and the door comes off very easily. I don't like the snap on features to hold the carrier together as they have opened up on me several times. The real big issue is the door. It does not stay in place and falls out of the mounting holes I have a Sheltie that is around 14lbs and this does not even support her. This is not a large cage as advertised but a medium one. Bottom line, if you just want a cage in the house that will remain stationary, get it but don't transport with it. I recommend this cage very highly:http://www.amazon.com/Petmate-Kennel-Fashion-Bleached-Peacock/dp/B00063KG64/ref=sr_1_2?s=pet-supplies&ie;=UTF8&qid;=1299996956&sr;=1-2If you can find it in a large or medium, it will do the job and not fall apart.