I personally know the owner of ERM, Christian, and he is a great guy. He is super nice and will provide exceptional service. So if you decide to go with him I’m sure it will be a great choice.
However, if you want to get a few more plumbers from Calgary bidding on your job then you may want to check out Local ConneXtion. It is a new website created by a local entrepreneur that allows you to post a job in minutes (and it’s FREE) and then receive bids from plumbers.