I forgot to address some of your other questions +Franklin Bryan
The screendoor effect while visible, it gets less visible once you find the correct focus and the correct positon of the Gear VR on your face. Also the screendoor effect is more visible on some situations (i.e. Watching a movie) but games and 360 video and photos are a bit less perceivable. Once you start focusing on the experience you will find it more comrortable. You can't connect the quick charger while doing the mount trick because there is not much space left on the connector. There are two negative aspects though... 1. Price tag 2. Overheating issues
That does not mean that you will not overheat while using Google Cardboard or Zeiss VR One, it's just that Oculus has some safety measures built in which I think can be fixed to allow more playtime. There is a workarround, I found that I can double the playtime if I use Power Saving mode and turning on Flight Mode. With that I can get more than 40 minutes instead of 20 minutes of usage before getting asked to turn it off to cool down.