I stayed here in the Summer (January 2019) with my partner. Overall we had a great stay.
Grant's hospitality was impeccable and he was welcoming and inviting. We enjoyed meeting his dog, Bonny, and son Max who was in the house most of the time we were.
We occupied a double bed in a room opposite his son's, with the shared bathroom for the house down the hall and opposite the large kitchen. We didn't end up using any of the shared kitchen facilities as we spend most of our time in the city centre.
Transport was super easy with a tram and the train also close by. There are a lot of coffee shops in Thornbury too - lots of choice.
Getting into the house was easy and Grant organised things well for us. He was willing to be fairly flexible on check-in times which helped a lot.
The only minor quibble was that the bathoom wasn't totally clean; however, other than that the bedroom was in a good state as were all other communal areas.
I was more than happy staying here and would certainly consider staying again!