We were at CBR from 8/28-9/2 with our 7 and 4 year old boys. I can't say we had the best bus service, but it wasn't horrible either. I'm a pretty patient person though so having a bus take up to 15 or 20 minutes doesn't really bother me. There were times we got right onto a bus and other times we would have to wait a while. I don't think this problem is exclusive to CBR though. We also stayed at AKL from 9/2-9/5 and had about the same experience. I think the worst bus service is probably from the resort to Downtown Disney, but I'm not 100% positive.
Bus service isn't something that is a "make it or break it" in my opinion. Even though we occasionally had to wait for a bus at CBR, I would go back there in a heartbeat! I am seriously missing it so much!!!!

I told my husband every day, "I love it here! This is the best vacation!"

I was already thinking ahead to next year while we were there. I mentioned trying out another resort to my husband, but we loved CBR so much that we both just want to go back there again!!!!!! I don't need the amenities of the deluxe resorts at all.......just give me the beautiful, relaxing, tranquil surroundings of CBR and I will be in my happy place!