we did online check in in August, when I had booked my trip I requested on the phone to be in the same building as the other family we were traveling with, not connecting, adjoining but just in the same area. When we went to the online check in line we found out we were at opposite ends of CBR than our friends, when i mentioned it to the cm she was quite unfriendly and said "you have to request those things before hand" I told her i did and she said "no you didn't" but when she handed me my packet, right on the front was a sticker that said "check requests" That was the only request I had made so I pointed it out to her, she told me to hold on and went to talk to someone, can back after about 20 minutes, said you are now in the same building, basically threw our package at us and yelled "next" for the next person in line. I don't know if it saves time as it sure didn't for us.