I've been using DM Keith since before they were DM Keith (previously Royce Roberts) in Hull. I've had two Yetis and now an Octavia Scout.
I've had experience of various main dealers (not just Skoda) in the past and I have to give this particular branch top marks.
On several occasions they have gone above and beyond what I'd expect from the average dealer as far as any work required - especially on the matter of the silicate in the cooling system, where they took it upon themselves to reduce the costs to myself.
I can't vouch for any of the other branches of DM Keith, but certainly the Hull branch gets top marks from me!