We're a young family (our daughter is three) and we spent 4 nights at Ben and Sabrina's house. We drove in, there is ample parking on the streets around the house. And the address is a short drive into Bristol city centre and the usual tourist attractions.
The two-bedroom house is well appointed and is great for a small family like ours. Ben and Sabrina were gracious enough to let our daughter play with some of their kids' toys and books.
Both beds in the bedrooms are of good quality with very good mattresses for a good night's sleep.
The kitchen is well equipped with all the utensils and equipment you'd need to prepare a meal. On a related note, there is a Tesco superstore barely a 10 minute drive away if you need to stock up on a few days worth of groceries.
Worth noting also that their cat Coco is really, really good with children. Coco befriended our daughter almost immediately. We mention this in case anybody has any concerns about a cat being "on premise" during their stay. Very clean, very well-behaved kitty who just likes some cuddles and pets from time to time.
We used the house as a base to visit Bristol, Bath and Cardiff. We would not hesitate to recommend Ben and Sabrina's house.