I've gone through 5 mobile offices in the past year...either the compartments were lacking, one big black hole, no external compartments, etc...  This one is great and like my past 2, are TSA approved.  I just wished it was on wheels!  Week after rec'ing this, I ordered Travel Smart by Conair Heavy Duty Luggage Cart and it works great.  I only use the cart w/ the bag in airports (weekly) but on client sites, I carry the bag alone as it's not long of a haul fron the rental car to the client site entry.  Bag looks great, durable and like all my experiences w/ Tumi...wonderful!