I applied to Bath Spa this time last year. After looking around the campus twice and having two friends there I know quite a bit about it.
Yes, it is true that it is not as well regarded as Bath uni, but it does offer a broad range of subjects. It is quite a way away from the city centre, but there are Bright Orage Buses, or BOBs as theyre called that run direct from campus to the city. They even run up until 3 in the morning I believe.
From what I have heard, the night life isn't all that great, but the SU bar does offer cheap drinks. Obviously some of the courses are better regarded than others. It is particularly good for English and Education, and History also from what I heard. I'm not too sure about any of the others subjects.
However, it is quite low down in the league tables, but league tables are what you make of them, and so this is only as big an issue as you make of it. I also remember reading last year, I think it was in the Times good university guide, that Bath Spa graduates have some of the lowest starting salaries out of all of the universities, but this again could be due to the choice of subjects it offers.
Hope some of this helps