I had a wonderful time! It was everything I could have wanted. I was working in the evenings and they completely respecting my need for privacy. I was left to my own devices due to this, and didn't see them an awful lot, but when I did, I was made to feel completely welcome in their home.
John and his wife are wonderful people who could not have done more to accommodate me. The bed is REALLY comfy! The place is lovely, all the amenities are as described and I seriously cannot fault it. Will stay with these guys again next time I'm in Bristol for sure. Cheers guys!