Plumber 4 U, or Peter, did the plumbing rough-in for our new house. It was poor workmanship, pipes not attached properly, some leaks, and in our powder room he even connected hot water to all the roughed in pipes, hot, cold vanity connections and the toilet. We asked for 3/4" pipe through the house to the second floor which he almost did, except he didn't replace the pipe to the hot water heater, leaving that the 1/2" pipe that was there.
At the end of the rough-in job I agreed to let him attach a few end points, 4 short simple jobs, and he ended up charging 18 hours labour for the job, far too expensive for some short projects that should have taken a single professional plumber maybe an hour per job. Finally, one of those jobs was installing the shower fixture, for which he didn't put in air cushions to eliminate some shreek in the pipes.
While I don't mean to be mean, I've so far had so many good trades, but this plumber, while a nice guy, wasn't particularly good as a plumber.