I had this plumber for a bath/shower, and specified the source piping to be 3/4". It was done in 1/2" pex type A, and flow would have been terribly insufficient.
I had to have a different plumber redo the job.
Part of the remodel included plumbing for a toilet. It took several months to get the rest of the project to the point where the toilet could be hooked up to the water supply, only to find out it was connected to HOT water. I called to have it corrected. He told me he was "pretty busy" and I never heard from him again. I paid another plumber to fix it. read more