Certain times of the day, local broadband use all affect IPTV.
I have been testing several providers, some with EPG, some without, some respond quick, others don't.
Spend some time, when you find one, get 3m / 6m and see how you go from there.
Check your broadband is up to spec, do speedtests and get real world throughput, take of 2mb for overhead and you have your average speed.
Thanks. Lots of testing then I guess. Have you decided on any? Iv had 2 replies. Iv emailed them for more info