Just want to add to this. Just completed our first BCC comped room. Had the option when I called to pay gratuities up front so we did in order to not have to worry about spending on board. Roughly $600 per person between Port fees and grat for a 5 night inside room. Nothing special. Our issues arose when we boarded and they tried to charge us an additional $90 each for gratuities on a couple occasions throughout the 5 days. Was able to get them removed but had to provide reciepts. Made me feel like their BCC system doesn't register if you purchase anything else up front. On the other hand, have done Carnival comped rooms on a couple occasions and have never had any issues.
