We got the size 2 for our 30 lb cocker spaniel mix; it's very spacious. Aesthetically pleasing, easy to assemble (according to my husband,) with a comfortable mat (I chose an ivory cover in addition to the dark one it comes with.) My dog and I are both very pleased with it. In addition, the customer service was top notch - they communicated (via email) very quickly and clearly each step of the way. It came with smoky panels; I requested clear ones for the front so I can see Bear when I close the doors, but kept the smoky ones in the back, and they sent them to me very quickly.