Less then a year ago i had to replace a snapped garage door spring, called at three or four places that told me it was going to be well over five hundred dollars and that i might need cables and such and this was without them even looking at it. Finally i found and called Stampede Overhead Door, they were awesome. Courteous, knowledgeable, professional and it was only around two hundred bucks even though i kept asking them about certain upgrades but they told me i didn't need it and to save my money.
I actually had them come out again last week because my door sensor's weren't working, the garage door would only shut if i held the button down. The day i finally called i wasn't in the best of moods and just wanted to make an appointment so it wouldn't be my problem anymore but the guy on the phone was calm and even made me laugh, he said that he would feel bad about having to charge me to send a guy to my home when he could probably talk me through the repair to do myself.
He had me try and few simple things but they didn't work so i set up the appointment and the guy they sent over was great, took about 30 minutes and he even replaced my button which was cracked after having to hold it down for a week but he didn't charge me a cent for it. It really is a good company so i highly recommend them, if you call and get a machine, just leave a message and they will call you right back.
http://www.stampededoors.com/
403-271-8223