We stayed in CBR in march of this year. Yes, it is a huge place but we still liked it. We were in Jamaica which is a 5 minute stroll across the bridge to OPR. The rooms were a good size and had everything we needed - me, DH, DD8, DS3 - and mousekeeping was good, too. Heard differing views about that, but they did our room great and every day they moved the kids soft toys! One day they would be watching tv when we got back, another time they were in bed - kids thought it was fab!
Possibly the only block to avoid is Trinidad South as it is the furthest away, but some people like that. We were originally put in there but we asked to stay somewhere else. I suppose it depends on how often you intend to use OPR. A lot of people like the quietness of it, but with us having the kids we thought we would be better being a little nearer OPR.
We have just booked to go back again Sept 2007 and are staying at CSR this time to have a change, but I would still recommend CBR. Loved the soft music playing as you cross the bridges, and as earlier mentioned, it's nice watching the Epcot fireworks from the beach!