i say dont trust best buy..and even the shops could be shady...its hard to say...it all depends on the individuals that work on your shit...if they're good installers it'll be clean and orderly...if not..it'll be a messy job w/wires twisted..WiLL is rite..its not easy to do a job that you'll b proud of..trust me..i watched the guys at best buy install things while i waited for my bf to finish work (he was an installer)....and i can honestly say...some of them are pretty lazy and shady...

The shops...they could get cocky and do as bad of a job if not worst..good luck..just do your research carefully...maybe u should look into people who already had their shit done...and ask them if they're happy about it...and take a look yourself to see if u like the job