We had a decent stay in Bristol, the size of the flat is better suited for couples, I wouldn’t recommend it for groups larger than 2 people. The size of the room is true to the photos.
There’s no separation between the toilet and the shower so it might get a little inconvenient after showers.
There are things to do in the area but it wasn’t exactly central.
You might be weary that the walls are very thin, so be prepared to hear everything.