I initially purchased the Anker Astro Mini (2nd gen, 3200mAh) as a small backup to keep my smartphone topped up following a comparison and discussion at the Wirecutter (http://thewirecutter.com/reviews/the-best-portable-battery-pack-for-daily-use/). My requirements were something small (that would fit into a small extra pocket in my backpack), lightweight, that would be able to charge my phone from dead to full or near full, and that was simple to operate.I've been using the Anker Mini for over a week now and overall I'm extremely impressed. The box (which was satisfying to open thanks to small touches like the "Thanks for choosing Anker!" message on the flap) contains the Anker charger, a Micro USB cable, and a drawstring bag -- it does not come with a USB plug. The Mini comes precharged and is usable straight out of the box.The Astro Mini has two ports, one for charging the itself and one for charging your devices; a LED light, and a single button. The device itself is not the most intuitive so I found I did need to read the manual -- a quickstart guide would have have been a nice addition. The LED indicates when the Mini is charging either a device or being charged (green), is low on battery (red), and is itself fully charged (yellow) however in my usage so far I haven't found the LED particularly necessary. The construction of the Mini is perhaps the most standout feature of the design. It feels rugged (as if it could be dropped and beaten, much like an iPod classic) and sturdy which is an overwhelming plus when compared to other similar products. I've discovered that the Mini fits into my jean pocket with my wallet which is another massive bonus for it.I've found the charging speeds from the Astro Mini to my phone to be fast as advertised but not enough to keep up with my Nexus 7 (2012) whilst using it. Whilst charging I would have expected the Astro Mini to get hot to the touch but this is not the case, a positive if you're charging on the go. Charging the Mini is not as quick as I'd hope despite me using a fast charger but charging overnight eliminates this problem. A fully charged Astro Mini is able to revive my phone from dead to near full capacity and so I can confirm the advertised capacity is not far off reality. Overall the charging experience is solid. I cannot comment on the "power IQ technology" as I've only used this with two devices.A few comment about the drawstring bag. It comfortably fits both the Astro Mini and the included USB cable and is my go to method of keeping them secure and together. After a week of carrying them in the bag I have noticed wearing from the inside of the bag and small black fluff on both the charger and the cable however this is not a huge concern of mine. The bag has a drawstring closing mechanism which in my experience is fairly hit and miss, occasionally not closing as smoothly or as fully as I'd hope. The bag does not feel as if it's the highest quality material and I'm certain it's not going to last anywhere near as long as the Astro Mini. All that said, I'm glad they included it and I will purchase a higher quality version when this one wears out.Overall, the Astro Mini met and exceeded my expectations. The Astro Mini is well constructed, small enough to fit in my pocket with other items, and is solid in the charging department.