I bought this crate specifically for the 16 hour drive I had to take my cat on while moving. It was great - she's big, so this was just enough room for her and a small litterpan. It fit right in the front seat of my car. The tray on the bottom is very easy to take out, and it sets up very easily in no time at all, with no tools required. It also folds up very nicely for storage. Just be sure to have a towel nearby to shade the carrier if your pet is going to be in there and near the sun for any extended period of time - I made the mistake of not doing that, and my poor cat was panting after an hour in the car because her dark fur was absorbing all the sunlight. Putting a towel over fixed things right up, and the ride was smooth after.
Also, note that if you keep cat litter in here, a little will come out the sides since it's just a cage. I didn't think it was a problem, but be aware you might get some litter in your car on longer trips.