After 2 days of causal research and reading all 29 pages here (
), I went with the Mophie from Apple.
I narrowed it down to either the Mophie or the RavPower. Although the RavPower is smaller overall, the Mophie appeared thinner which was more important to me. I didn't care if it was wide, I just wanted it thin. I watched a few YouTube videos and noticed that in some RavPower videos the YouTuber had to adjust the phone to get it to link with the RavPower, I never saw that issue with Mophie.
Overall, I'm happy. I was immediately impressed when I took it out of the box because it was quite hefty and a had a solid feel. It seem very high quality with a good length cable similar the the Apple HDMI cords.
I know you have to be carful with the way you place the device, but I haven't misaligned it once. I tend to be a bit funny about how I place my device anyway (e.g. if I set it on a table I always place it parallel to the edge so it's straight). I naturally place it centered on the puck. If you just tossed it on you would have trouble I suppose.