I live in Tang Hall, as do most of my friends, and we've not had a single problem. The locals are . . . how to say this diplomaticly . . . distinctly working class. Lots of single mothers, young parents, people on benefits etc. However, they are largely decent people and the student population is friendly enough. The facilities are pretty good - I live right next to a bakers, chemists, about four take-aways, super-market, hair/beauty salon and bus stop. I regularly wander around at 3am (usually walking home from town after a night out) and I've never felt threatened.
Plus, there are loads of nice student houses, and it is close to the university with great bus links into town.