Staying with Frank was tremendous. I stayed with my partner for a few nights in Bristol and Frank communicated clearly, then met us at the door to show us the space. The space itself is highly memorable and as described, but with all the modern essentials we required. It was easily the most unique place we stayed on our travels through the UK.
Location wise, I am not an expert but it suited our needs. We were driving and parking was possible, if a little random given street parking.
If you are looking for something a bit different (I would argue this was one of the original points of Airbnb) I can highly recommend Frank and the gaol.