I would assume that you go to Sewell based from previous posts and even though I never have experienced Sewell, based on everyone’s positive purchase experiences, their service would be as good.
On my previous car to this 5BW that I traded for it, I had an Audi that I took to the dealer for everything including oil changes for yrs. Recently, had them perform routine service that included changing oil & filter. About 4 months after service, my “reduced oil level” came on. Audi doesn’t have a dip stick, so no way to check without sucking it out and measuring. I raised the hood and found my brake reservoir cap laying by the strut tower. I popped the cover over the brake reservoir and sure enough, it had been off and exposed for almost 4 months!

Previous service for yrs from them was excellent and the tech must have been in a hurry. Then, they checked my oil level, it had been overfilled by a quart!

I have 3 other vehicles and perform all my own oil changes on them allowing me to check everything underneath and more.
With my new 5BW, I will do my oil changes and anything else I can without special tools. Summary, even good techs have bad days, i wish it wasn’t on my car though!! I will triple check all dealership work moving forward when I have to use them.