We contacted Jia roofing a bit over 2 years ago to have an estimate on our roofing. A few of them came by (i think they were just finishing another job) and one gentleman (only one that spoke fluent english) provided a quote after consultation with the others.
They were the cheapest and I felt comfortable with them but decided not to pursue it at that time. I called them back again last year and had them provide a quote. They were able to honour their price they gave me last year. As such I also asked them to provide costing to replace all our eavestroughs and flashing. They were very reasonable and were also able to colour match our eaves/flashing with the colour of our window trim (a slate colour).
They were in and out within a day. Very clean.
There was a leak around the bathroom vent afterwards that I had to get repaired. That was the only mark against their work.