I should start by saying I live in a rural location in Ontario Canada. I have no issue with running Netflix in standard def, 720p. Netflix standard def uses about 5mbit/sec. My internet is mobile but is supposed to get upto 25mbit/sec.
I setup XtremeStream using their APK on my android box. The guide and everything worked fine at first but when I went to use it later that night it kept buffering.. I tried closing the app and clearing cache and still issues. It buffered every few seconds or didn't work at all for some channels..
I guess I'm wondering if this happens occasionally or do I need to find an IPTV service closer to my location?
First of all your mobile/internet provider probably hosts local netflix cache servers, and netflix can adjust quality dynamically on the fly according to your connection. So it is a bit different than a stream the provides a steady bitrate.
Are you tethering your android box to your mobile device? Probably resulting in a high lag/poor connection. Try a trial somewhere else, and if that is having problems too it is most likely due to your setup.