Brought my SQ5 in for an MTM Cantronic tune, and waited for the vehicle to be done. Was able to browse through a wonderful collection of automobile related magazines while waiting, very comfortably in a social distanced environment. As for the tune, I may be jaded with the additional HP afforded by the tune, or perhaps was expecting more. That being said, the additional HP is definitely there, and is delivered in a seamless manner. The car behaves just as one would expect, no glitches, stumbles or odd behavior. It is as if it was provided by an OEM tune, nothing changed, with the exception of additional HP. Would highly recommend the MTM Cantronic, it looks fabulous in the engine bay and delivers on what it promises. As an additional benefit, MPG is up by about 1 MPG over the past 3,000 miles, so I expect the additional economy will continue. The staff at Griffin, from Terry on down, is nothing short of spectacular, they know their products, know the cars, and care whether you're in for routine maintenance, or a no holds barred upgrade, they can get it done. I've been dealing with Terry and staff for well over 30 years, and some things don't change, the passion for the cars, the professional manner in which the customer is handled, and most of all, the immense knowledge of Terry and his staff. Would recommend to anyone looking for either performance upgrades, or a viable alternative to having to go to the dealer.