I think the reason this place doesn't have too many reviews is because their client base consists of two groups of people: folks who have been coming here for decades because it's great, honest service and don't realize that other people who don't know about this place yet might look online for a good service shop, and folks who lead super busy lives, depend on their cars to get them to their more-than-fulltime-worksites and don't actually have time to write reviews.
I totally trust these guys. They've serviced my family's cars for years, and we've never come away with the feeling they have padded the bill at all or done work when it wasn't necessary. When I bought my first car secondhand, I brought it to them first for an inspection - and even after paying them for their time, being able to take their sheet back to the seller and pointing out a few minor issues needing fixing saved me about three hundred bucks on the final sale price of my car. Two years on, I haven't had any problems worth mentioning on the car.