We're in Canada, and the threads on the supplied pipe fittings didn't fit the threads on the existing pipework.  We're in an old house and had a soldered connection with an existing threaded pipe that was not compatible, but this might not be an issue for some people.  We made it work, but were not expecting the extra work and cost involved. 

My husband also built and added a top piece to improve the height and look.  It's ok for the cost and the limited space we had available in the bathroom.