First of all, I think Bourton-on-the-water was the right choice for staying in Cotswolds. We stayed a night at The Dial House and it sure is a lovely place.
We booked a good room but did not know that there was an attached private garden which was bigger than the room itself. The room is lovely and the reception staff were helpful and warm.
Bourton-on-the-water not being too big and the hotel being on the high street, everything was within walking distance, including restaurants, shops, tiny bridges, miniature Bourton-on-the-Water, etc.
Would rate 4/5 as they did not have Sky Atlantic which airs Game of Thrones (and I am a big fan) but to be fair, neither did 80% of the hotels I stayed in in the UK. So a 5/5.