For the price of the shop brake job, you could have bought all the tools you will ever need and the half the parts and next time you would only need to buy the parts. If you buy the parts at fast lane they will only cost 1/2 of what you pay at the dealer or shop. Labor, where else can you make $50 or more an hour tax free? DIY is the way to go.
Safety: I've run pads down metal to metal. It destroys the rotors but the brakes work just as good. Only one pad at a time is metal to metal, then you know they must be changed. Biggest thing in brake safety is the hoses and brake lines which can rupture. Did you replace all of them?