I love the ease and lightness of this crate.  We participate in dog sports and are constantly carting our 4 dogs' crates back and forth over a weekend of competition.  Being able to load up all 4 crates plus their other flyball and agility equipment has been a back saver.  Keep in mind that this crate is only for dogs that have been crate trained.  They are light and easy to fold and unfold, but a dog who wants to get himself/herself out due to boredom or anxiety will easily destroy the fabric material.  However, the plastic backing and metal door makes it a bit more durable than the typical fabric or collapsible fabric crate.  It easily fit our 44 lbs mix and 55 lbs labrador.  

Pros: easy to fold and unfold
Cons: fabric material is not for un crate trained dogs