Personally, I think Harry does a good job. I had sent in my SL66 in Jan. 2022 for servicing at a $700 fee and it came back in little under 4 months, which I would say is average turnaround time for most technicians (at least in my experience). The SL66 has also been working perfectly fine since then without problem. Granted I've only used his services once, so it is possible I got lucky, but doubtful since he still does come highly recommended.
Regarding Harry's cost, I don't mind paying this much especially when I take into account the age and intricacy of the cameras I use. The SL66 being a good example of this, being 50+ years old with some 1000+ parts. I would consider Harry more of a specialist than a regular technician and his prices reflect that fact. Moreso, knowing that he has worked at a Rollei factory here in the USA for 15 years back in the day.
Side note, If any one is willing to shell out the cash for shipping there is a good shop in Germany called Paepke Photoechnik which services Rollei products from 1960 onwards, and the Rollei 2.8F should fall under this if I remember correctly. Harry has also recommended this shop as well. I plan on using their services some time next year, after some budgeting.