I know there are alot of butchers that intall this stuff. Futureshop, visions and so on do a crap job.
The interesting thing is that Future Shop/Best Buy and Visions probably do more installs than every other company in Calgary combined. You would think that if they do such a crap job, maybe that wouldn't be the case? I have worked for Future Shop/Best Buy for a long time, and I'm not going to try and pretend that there haven't been some jackass's for installers in our bays that have done a crappy install...it happens, but those guys don't generally last long...they can cost us thousands of dollars on a single vehicle if they screw something up.
BTW in the busy season(now) our bays are pumping out upwards of 10 cars a day(depending on the size of the bay and the number of installers. Multiply that by 9 stores with bays and that's a fair number of cars....they must be doing something right.
If you want some names of experienced guys that have been doing this for a decade or more, I would be happy to share that with you.