When I moved to Cardiff I didn't know which garages to trust and tried a few before using Ace, who like their name suggests, really are the best.
I was honest and straight up with them, saying I'd just moved to town and would be loyal to any garage who could provide a reliable and cheap service.
Their prices are great and they're honest about the work. Plus, they do it well. At one point, my car was considered a 'write off' by another garage and I had quotes of up to £600, even one misdiagnoses from Kwikfit who postponed the problem for a bit. However, Ace managed to save my car for around £200, which really meant a lot to me.
I can't recommend them any higher. Definitely give them a go, even if it's just phoning for a quote, I'm sure you'll be happy with what you get.
Jack, Cardiff