I have used pronto plumbing twice now.
The first time was to unclog one of our drains that's in a tricky area. I remember it being a little pricey but they came out same day and did good work.
The second time I had them come out to rework a broken pressure reducing valve and it was pricey but the technician came out the morning after I called in the work was done and it looked really nice, but there was one issue that we were unsure of; the one pipe and its location in accordance to the pressure reducing valve that he installed. The work was done and paid for and about a week later I noticed that our pressure was still way too high and it shouldn't have been so I called them and told them that I felt that it was wrong and something needed fixed/tweaked. The same technician was told that there was an issue and he came out about an hour after I called and completely reworked our configuration we had to suit the original job better and solve all our issues. There was no charge for the rework and any and all parts were free.
I would recommend pronto to anyone looking for good plumbers, the technician's name that I had was Aaron Ward. He seemed to really care about his work and wanted to make sure it was done right. I would definitely recommend asking to see if he's available.
How the jobs were handled were professional and fair in a timely manner. The pricing is above average.