So who watches xFinity on-demand streaming and is happy with the performance? I decided to give it a try tonight because we have a free week of premium channels, and I thought I'd watch the first season of Game of Thrones. Watched three episodes. As a long-time Netflix streaming customer Comcast's performance was pretty laughable to me. Glitching, decompression artifacts, pixellation, many episodes of significant IQ degradation, pauses, stuttering. I mean, this is the best they can do over their own proprietary network? I was kind of excited about maybe adding HBO for a few months and watching a few other shows on-demand, but meh, no way I would sit through that repeatedly. If others have had good experiences maybe I'll give it another try tomorrow.