I can usually find some channels that are down more often than they are up as in channel 622 and some of the 300 channels although looping, buffering, freezing or audio with no video or video with no audio are not entirely off the menu when it comes to issues. The odd part of this comes with channel requests as I find it odd when I think of requesting channel 622 or the CCTV channels which are not without issues of their own. More often, the Canadian channels are either down or having sound or video issues that relate to black screens with or without audio ? Might be time to fix the channels listed before requesting any new ones ?