I have used servicing stop in the past and have had fine experiences
I used in June this year.
Firstly they were two hours late collecting the car despite confirming twice by phone. The man who came to collect said he wasn't told a time. Then they returned my car with a crack in the windscreen. They left my car in a no parking zone with no warning they were returning the car and I was at work, despite me telling them via phone not to park it there risking a huge fine. I have called >10 times and sent 6 complaint emails with no response. Awful.