I use it pretty much every day for groceries - it is surprisingly tough for the size and weight and will handle well over 10kg with no problem. This means that it lives permanently in my jacket pocket and I no longer try and carry silly amounts of things home in my hands. The handles bunch up and become like cord (which cuts into your hands a bit) with heavier loads - if you are walking any distance with > 5kg you might consider the backpack version.

The bag packs up incredibly small inside its own pouch. The same type of awesome little pouches they include with many of their products. Also has that little S2S carabiner.The bag is also undeniably strong, but one thing annoys me a bit. At 5 feet 10, if I'm walking on a slightly inclined sidewalk and I'm not careful, the bottom of the bag can drag on the cement. I wish the handles were just a bit shorter. I've seen worse though. Perhaps the Nano option would be better?

The handles are too long to carry in your hands, but a little short to be on your shoulder. Additional short carrying handles are needed. The case is too small to put a bag in it, you need to make an effort. Make a large pocket that is easy to stuff the bag into and that can be used for small things when the bag is in use.