As soon as my ED30 came out of the warranty period, it was a specialist for me. A the dealers, my car was just another target for the technicians to get in and out of the workshop as fast as possible.
I dislike that dealers use a pump to extract the oil when doing an oil change for instance - all in the name of saving time for the technician. I've always known the only way to drain the oil (and contaminants) properly was to drain the oil from the sump.
At my specialist, i know he removes all the wheels, does a proper check of the brakes, greases the hub so the wheel doesn't bind to the hub, greases each wheel bolt and then tightening the bolts to the correct torque settings. At the dealership, you get a quick peer between the spokes of the wheels to check the brake pad life (in the hope of selling you pads and disks!) and that's it.
In my opinion, the service departments at dealerships have become so target/bonus driven that your car does not receive the level of care and attention it deserves. Does the young lad who is trying to get your car done under the target of 1hr (or whatever the set time limit is) really bothered about whether you come back year after year or more bothered about finishing your car quickly so that he can he can move onto the next one so he is on target to get his bonus?
In short - specialist for me!
Hope this helps
Rich