We really enjoyed our stay in Elizabeth's flat. It's very clean, the beds are really comfy and there's a good, modern kitchen and bathroom.
The flat is very central, but if - like us - you're mostly going to be enjoying the tourist attractions of Harbourside (SS Great Britain, science museum etc.) be warned it is a good 30 minute walk to get to these. If you want to shop you really couldn't be closer to Cabot Circus. The flat is also really easy to reach from the M4!
The flat is tucked away behind some rather grim buildings and the area felt a little 'edgy'. It's a ground floor flat, but has something of a basement feel about it due to the low ceilings downstairs. The car parking space was a huge bonus and there is some nice shared outdoor space at the back of the flats.