All channels. My internet is great, and when it does stream it streams perfectly. My other IPTV either works perfectly or not at all, and when it does, it never buffers. I also have another one for a different country that works 100% all the time, but doesn't have USA channels.
For JetStream, if I exit the channel and re-enter, it immediately starts up and plays great. I should say it's freezing rather than buffering.
These other sites are good for the phone once you get past the ads, but I want one for my TV. Streams strfish and streameast are both for the phone.