you can not compare these devices as everbody has a diffrent need. I look at this way that P6 will eliminate Nvidia, xbox, playstation in my side (even 4900 and up devices pretty much same for me to kick those devices out) but most of you may not agree with me. they all do iptv and works very well however you want to run.
so comparison and negative review means nothing to me because of individual's lack of skills and diffrent needs. you look at the specs, try it as they come with warranty and enjoy these state of the art devices and I bet you won't be disappointed.