Few points which I found after using Binge+ box for 2 months - after prolonged viewing the voice doesn't sync with live stream (both satellite and OTT). Even in bad weather you can continue viewing your channel via net (huge plus). Amazon prime still don't support 4K HDR, so only 4k content can be viewed from youtube / and Google Movies play.
The box does upscale all signals to HDR meaning even VGA /SD are shown in enriched color