I've taken a few Macs to Encore for upgrades over the years. They are always precessional, reliable and are priced right. I will also add that their turn-around time for repairs is very quick and exactly what they said it would be.
From Encore Technologies Apple Repair Center
Encore Technologies is an Apple Authorized Service Provider, with certified technicians trained according to Apple’s strict standards. We are able to repair your macOS, iOS, and Beats devices or related accessories under the included limited warranty or an AppleCare Protection Plan. For computers that have passed through their warranty coverage, we offer out-of-warranty repairs and upgrades at competitive rates.
