Okay.....I bought our SW tickets on Feb 26, and added EBCI for my dd and myself. My dh is on his own reservation since he is flying home on SW..dd and I are not. So, in the interest of seeing what would happen if I bought EBCI and dh didn't, I did my little experiment. Checked in today, for dh's 9:35 flight tomorrow morning...Providence to MCO, non-stop..originating in Providence. I hit the checkin button right at 9:35, must have been a second or two early, according to SW time...I was unable to do it..immediatly hit 'checkin' again (that all took about 4 seconds)...he got A39. So...I printed out dd's and my boarding passes...A16 and A17. Either 22 people got in there, before me, in a space of about 5 secs, or there are a ton of EBCI's on this flight.