Although you took the LNAT, I doubt you took it as part of the Kent application process, so what's the relevance? (Not that the LNAT is necessarily indicative of a 'good' university)
"Kent features quite heavily in MC firms"
Not at any I've visited.. places like Allen & Overy are still heavily Oxbridge dominated. And yes, there are making an effort to move away from that, but I doubt they are actively looking at Kent Uni..
(but academics aside, my boyfriend goes to Kent, and yes it is a nice campus university with a nice atmosphere, but i'm afraid i can't think of anything better to describe it with than 'nice', so if that is what you are looking for, then go for it)