No reason to avoid taking work to a shop you know and trust.

A big benefit, IMO, to going to a Citation Service Center is turnaround time. Most small shops only have 1 maintenance shift and even larger shops (WestStar, for example) only have 2 shifts...and when the boss wants his plane back from maintenance yesterday, that third shift can really speed things along and make the Cessna shop rate premium well worth it.

When we had our 1983 C-II we did all our heavy maintenance (Phase 1-4/1-5 checks, fuel leaks, etc) at a Citation Service Center for this reason...but had our based FBO, who has a 145 certificate, do brakes/tires/all pop-up items. Their work was good, the price and convenience right, and they always appreciated our business (which Mother Cessna doesn't always appear to).