To be honest vertical door kit isn't a good sell off our site,so we don't keep them in stock.
We only have sold couple of them since we posted it on (maybe a year).
We never heard or had any problems with them, but what I could tell you is they aren't super easy to install. Fenders have to be taken off and stock doors are pretty heavy.
I would say you will need at least 3 people to help you out if you were to install it yourself.