It's been 2 years since our nightmare with Priority, and it scares me to know that they are still in business.
We approached 4 plumbing companies to do a full job on a home reno - plumbing and new rad lines. Priority quoted us 10k, was friendly and seemingly knowledgeable.
They started soon afterwards using flexpipe (recommended as a cost effective solution) for the rad lines. That day I was a little troubled when I found the guy was reading what looked to me like a plumbing instruction booklet. When I went in the house, I was shocked to notice they had drilled a hole so big in a 2x10 ceiling joist that it had to be replaced. I called the office and they said that the employee that cut the hole was no longer with them. Also turns out that the guy reading the instructions didn't know what he was doing either! I was told that he too was no longer with the company. Finally a third guy, while soldering, melted our electrical to the stove. And said nothing about it! We noticed it and called the office.... once again, the employee is no longer working for Priority.
The 1 month job turned into 3... In the end, they had to call in their dad [Company Name Removed - ed] - seriously! - and have him and his guys come to the house and fix the mess they made. At this point, they were very apologetic, helpful and willing to fix all the mistakes they made - we would only be charged material costs. (ps: I would recommend [company name removed--ed] if they were not related.) However they tried to charge us another 18k!!!! We refused, asked them to send us a detailed materials list - they did, and that's when we noticed that they were charging us a markup that would make you laugh. We went to Nobletrade(their suppliers) and were quoted 4k in materials. Priority told us they can charge whatever they want to charge for the price of a 10 cent washer.
In the end, we resolved the matter by paying the 10k quote + the additional 4k in supplies + a meeting with our lawyer and seemlingly they were happy with that.
Read the negative reviews to get a sense of what kind of company they are. Logically it's the only reviews you can trust.