I just finished my BA here and, well it's alright.
I was on the city campus and the buildings are generally quite new, but personally I didn't like it. But that's more down to personality than anything. I didn't really like being at the university that was very looked down upon by its Russel Group equivalent just up the road, there is a very firm rivalry between Beckett and Uni of. And this is very strong, generally you'll find a great amount of the Beckett students are reasonably local, whilst those at Uni of come from quite far afield. If you think this will bother you, it's an issue. But if not then you won't have a problem and can embrace the Beckett. It's a good uni if you really like nightlife and want to go uni to have fun, but if that's not your thing then don't bother.
I did one of the courses that the uni does excel at and the good lecturers etc were excellent, but the bad ones were terrible. There was a very wide gulf between them. And some, had incredible depth of knowledge, but equally they were **** at teaching and basic communication skills.