I an so looking forward to using these cubes on my next trip (in a month). I have packed and repacked them several times and am very impressed by the durability and space. The design fits perfectly in my backpack as well.
I bought four of the small packing cubes a few weeks ago before a two-week trip to Europe. I had bought and returned a set from Eagle Creek because they seemed flimsy. This Peak Design style is awesome. Not flimsy, so they are easy to pack, but not so thick that they take up a lot of space. The compression feature is pretty easy to use and I love the opposite compartment for dirty clothes. I mostly use a carry on roller board and mine can fit three small on one side and then another small (with shoes and my toiletry bag) on the other side. I packed tops in one, bottoms and dresses in another, undies and PJs in another, and swim suits and workout gear in the last one. I stayed super organized even after 8 different hotels in 13 nights. My boyfriend was jealous haha. A couple of other sizing notes: I had originally bought the medium but it was just too big. Unless you’re a large person or want to pack sweaters, I would buy smalls. Also I had read that the 30L Peak Design bag (which I have) can fit 3 smalls (aka 3 units), but it can actually fit more because they can stand on their sides. We’ll see how they hold up, but so far super happy with my purchase!