i completely trust these folks. they offer multiple options, and clearly aren't manipulating information for economic gain. they really feel like a personable, neighborhood mechanic of a bygone era, often replacing small parts for just the cost of the part.
and they try to offer lower cost alternatives to manufacturer's service schedule for certain services...and explain why they do so. and they charge less than volvo dealerships for their work, but i feel like they pay very close attention and care.