GT Peace is an excellent shop. They are the only ones that work on my car for things I cannot handle.
https://gtpeaceauto.com/
Mach V is pricey IMO and don't really care about their customers. I stopped using them over 5 years ago.
__________________
2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins
2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads
2021 718 Cayman GT4 - Fire extinguiser