This is the cutest crate ever. I love the pink color. My dog will even go in here when everyone is home just to chew on her bones or take a nap. A size small perfectly fits a 20 lb Boston/Pug mix. If your dog is an escape artist, however, you might want a different crate because this latch is kind of easy for them to unhinge. My dog has escaped two times, but that was when her separation anxiety was a lot worse, which I think helped catalyze her escape.
The wire is thinner than my old crate, which is also made of the black metal, but it is still sturdy. I used to have the really heavy silver steel crates but they are ugly and stronger than necessary. I guess if you have a dog you think might get out, you should use zip-ties all around and bungee the door when the dog is inside. The ... full review
Addendum added January 28, 2013: My vet had never noticed these carriers because I had never put one up on the exam table until my last vet visit. She looked at it with interest and totally concurred with my opinion of having a small, but open carrier for my two (panicky) cats. She has seen more than a few overheated pets in too enclosed carriers. Since I live far from the vet I always carry spare towels for the bottoms of the carriers and she found that the "stable floor covering'* I use was an additional comfort feature for my pets long trip to their appointments. (I just ordered the larger size of this carrier for my "Phat Kat" and will donate her previous carrier to our local animal shelter.)