I got tired of lugging my 20LB and ~20Yr old Brightline flight bag around. Especially for just day trips. So I ordered the B0Slim with an added CS2-tall center section and a flat cap-rear. I now have a minimal flight bag that holds my iPad and misc flight stuff for my day flights, and a computer bag with pockets for misc computer stuff for carrying my 14" laptop. When I go on my long trips, I can zip them all together and only have to carry one bag. My only complaint is that I should have thought thru what I wanted/needed a little more carefully. I would have only had one box delivered instead of three and maybe saved some shipping $s. The process/website was painless, the support staff answered a couple of questions promptly, and even included a zipper pull when I mentioned that one of the zipper pulls on that old Brightline had broken. BTW, that old bag is still in good shape. It survived a lot of years of being lugged around on my flights. It was just too big for me now. Unfortunately, it is so old that it was purchased before the development of the modular system, I could not just unzip/unclip things and re-configure it.