Yep, I was there last week for a P1, was £42 as I supplied oil and filter, plus £18 for an engine flush to make sure no gunk in there (not necessary but nice to know its all clean), so can definitely vouch for work and customer service, being female its hard to find garages which don't try and rip you off, so very happy going to Sly.
You have a 370 so your costs may be slightly different to the 350's, I'm not sure.