I am very impressed with this bag.  As a business traveler I take this with me every week for 5 days at a time and am able to fit everything I need without any issue.  It is replacing an old Samsonite roll-aboard that lasted me 5 years of hard travel.  This ebag amazes me every week with the amount of stuff I can fit into it without ever using the extra expansion.  It's light weight, rolls very smooth and has multiple handles to lift into bins.  It fits very easily into every overhead bin I have encountered.  I also like that it is different than every other black bag out there.