I stayed in Brunel for the first few months, and then moved up the road to Kingswood. Brunel is quite an old campus. It's self-catered, and you get a sink in your room. The rooms are a fair size. You have to pay to use the bus, last year for the first term it was £75, then about £80 for the second (roughly).
It's a quiet campus, but I'd say how "fun" it is depends on who you are staying with/who is in your corridor.