The door bit is a bit fiddly
This carrier does the job and is quite handy, however, I found that if your trying to quickly secure it after putting kitty in and you've forgotten to slot the door in place, then you've got to try and correct it with kitty trying to get out! Can be a bit of a pain. I have also watched my vet on numerous occasions fiddling around with it, it's like watching an episode of the Krypton Factor :)