The Xfinity app is a failure on my roku tv. SD channels will sort of stream, HD channels will not start at all. On demand just starts and stops. Pretty much useless. However in my roku 3 box connected to a hdmi input on the same roku tv the app works pretty good, I haven't noticed any problems with it running. The app itself could use some fine tuning, I haven't found a way to change channels without going back to the tv listing, there seems to be a lot of button pushing and menu levels just to change to another channel. So how well the Xfinity tv app works seems to depend a lot on the roku hardware you have.
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