Do yourself a favor and never step foot into any dealership service department ever again, unless you have a warranty issue.
I use dealer shops for anything other than the basics (some oil changes, tires, batteries, filters) with positive experiences. They work on their own vehicles all day everyday. I'd prefer not to be somebody's learning experience. I can't recall the last time any of the Honda, Toyota or Mazda dealers I've used have tried to foist anything on me. And they never have screwed anything up. Actually, I can think of a couple of cases where dealers did not want to sell me something.
When I asked one Toyota service writer when he thought the purported lifetime trans fluid should be changed, he said "maybe never." I had it changed anyway. I made an appointment with a Honda dealer to check out obvious symptoms of warped front rotors. I was living in the boonies and had to drive 40 miles to get there. That service writer confirmed my diagnosis but said I'd have to make another appointment for the work. Wait, what? I said I've never heard of such a thing. He said he could do the work if I was willing to wait 2 or 3 hours. Well, that's par for the course so I got the work done. He was willing to have me go somewhere else.
That's not to say some dealers won't push a bunch of unnecessary services. When that happens, decline and then look for an alternative.
As for independent shops, I tried one recently with high ratings on the webinets, LOL, for an alignment, thinking ahead to finding a shop for an upcoming spark plug change on my Sienna, about a 4 hour job @ around $500 at the dealership. The back 3 plugs on that vehicle are a b*tch--manifold removal along with other parts. The alignment appointment was made with the son for 9:00 AM. The lot, the shop, the office were a chaotic mess. The old man was in the office, piled high with papers and boxes, and marginally compos mentis. He said they had another vehicle on the rack (that much he got right) and to come back later. When, I ask?. Oh, this afternoon some time. As best I could tell he didn't even have an appointment book. I went to Mavis Tire and got it done.
My horsing around with independents for that spark plug job is over. I'll pay a couple extra hundred bucks to have Toyota tear apart an engine compartment they are familiar with. I do know a very good independent body shop near Watertown NY, a guy who does the local Toyota dealer's body work, if anybody is in need.