Hi, no direct experience, but somebody on yacf has from memory.
They're local to me, a few friends have visited and come away with very positive reports. I'm hoping they will be displaying at the Abingdon Spring Cycling Festival on Sunday 13th April (if you want to come down and join the fun!).
My understanding is that the frames are very well made and specc'd. However, they are not frame-builders so frames are not custom built exactly to fit each individual like say Rourke or Mercian or Jacksons etc.
The operators are seemingly knowledgeable and enthusiastic and it effectively means you can have the bike build tailored to your needs ... thus still far better than an off-the peg job.
What's more they are a small independent company which for my money is always better than dealing with BigCo.
Try a post on yacf.