So far, I like it. I bought this to be part of my travel equipment and it worked like a charm the last several days. It's not tiny but it's compact enough to fit in a bag or medium backpack without much problem. the battery pack, while small, is convenient for a day of reasonable use and fits easily in the pocket. I had five devices charging (4 USB and 1 wireless) along with the battery pack and it held up nicely. if it had a couple 3 prong plugs as output it would be perfect for me.
I've only had it for a little over a week so, I may update later if I find durability issues (should get more of a test when I take it on some international travel soon) but for now, I'll give it a good rating. Does what it says and is extremely convenient for the traveler with a lot of gadgets (tablets, phones etc).
Forgot to talk value. At $50, for now I'll say it's in a really good spot. The ports + wireless and the battery are really good (and up to date) features, and the build quality feels solid.
I've been using it for travel the last few weeks and, so far, it's about 85% of my ultimate travel power solution (non-scientific percentage there). Not sure it was designed as a travel power device but it works. It's a bit bulkier than some others charge/USB power hubs that I have but not the biggest and still packs well in my suitcase (minus the battery pack).
The small battery charger probably has been the biggest "surprise impact" on my usage. I find it way more convenient to carry/use and I don't carry my bulkier chargers unless I know I'm going to be going for a long day with some seriously heavy phone/device usage. My biggest wish for it to be perfect would be a couple plugs for other devices like laptops as I mentioned above, especially at it's size (a little bigger version with plugs isn't a show stopper for me). Maybe version 2.0 (or a "travel" version).
No change in the rating, just sharing more of my experience with it.