I'm a third year university student at Queen Mary studying Business and Management...
I know you probably would have wanted my opinion sooner but here it is anyway:
QM is awful. Maybe it is just the Business School but I have never known such a useless group in all my life.
It has a good reputation yes but I would seriously consider going somewhere else because they will only make it hard for you.
The administration NEVER get back to you. Deadlines are always wrong. Technology always fails (the lecturers never know how to do anything on a computer themselves). Lectures and seminars are cancelled with no notice which is a real pain in the arse if you commute into university (although they don't care). Lecturers regularly come in drunk or hungover. They're generally more interested in their research than their teaching programmes. Lecturers won't reply to your emails-you're more than likely to get an out of office reply.
Now I'm in my third year I thought I would have been given more guidance on what to do after I graduate however they don't let you know about any graduate fairs (even the ones held at the university) so you have to do it all yourself.
If you're very independent and think you can complete your course with little supervision and support then it's the university for you. But if I had known about how bad it was before I had joined I would have just done home/distant learning because I feel like I'm paying over £3000 per year just for them to do research.
Another thing to think about is NOT to rely on any league tables or student surveys. What many people on my course have done this year is fill in their surveys so that Queen Mary comes out in a good light purely because they're worried that if QM gets a bad reputation the value of our degrees will go down because employers will think less of them. So take everything you find with a pinch of salt...
It probably is just the Business School, but try and talk to as many students on your course before you join (and not on open days, the ones working on open days are being paid to say positive things about everything).
Good luck!