The only one I can outright say isn't worth your time is Cardiff.
The Law library is constantly full or under renovations, the building is far too small for how many students it actually contains, and I've heard complaints that no required reading can ever be found. Friend of mine also complained there's so many Malaysians in the course that stick together he's found it impossible to make friends. I can't really comment on that, I'm way over on the other campus.