Just got my strongbag one a couple weeks ago. Only been using it on 2 day trips, havent taken it on a 4 day yet. First thing you will notice when you get it is it clearly had some thought behind it. First of all, the material shows you where your money went. I know this will last for many years dealing with the abuse of air travel. Plenty of compartments that if you want, are there, if no they zip up. The insulation is a bit thicker than I would have thought which limits what you can put in there, but the trade off is keeping things are the proper temperature longer. The side pouch holds a water bottle (like the ones we get at Eagle) which is nice not having to carry that (or put it under Jhook and have it fall out on an escalator).

Overall, I highly recommend that strongbad one. It is a bit pricey but like I said, when you get it you will know where you money has gone - especially with great material and design.

Just got to get used to traveling with an extra item now - you will have that regardless of which one you go with.