If your hubby is 6'3", I would be a little worried. We have a 2012 and DH and I are both 5'4" and under and the backseat seems small. I would just be concerned because he would have to have the seat all the way back (when I'm in the passenger seat, I feel cramped if I don't have it all the way back but I have to have it scoote up most of the time so DD doesn't kick the back of the seat. But if you were planning on getting one of the previous model years (2006 I think to 2011) those actually seem larger than mine. Maybe it's just an optical illusion but it wouldn't hurt to check the dimensions out. My friend has a 2006 and regularly has a RF Britax convertible (not sure which) and the two older boys she nannys for in the backseat with no problem but I think it would be uncomfortable in the back of the 2012, IMO