I would give it 5 stars for the way it looks put together, but putting it together was horrible!  Whoever engineered the bracket on the lower section must have flunked their class.  The bolt is under the metal plate where the wheels attach.  I have small hands and could barely get the bolt and washer in place - then you are trying to use the allen wrench to blindly seat the bolt into the leg, but can only do 1/2 turn because the short side of the allen wrench is too long to make a full turn.      
 I am sure two of the bolts ended up cross-threaded because I could not get them in right. The dog hid because I was so angry and frustrated - if you do this assembly as a couple, be prepared for anger and harsh words.