Darn near unusable

At home, on my xfinity WiFi, I cant play any recorded programs. They stutter. They jump back to the beginning randomly, then back to where Im watching. Horrible.

ETA: Six months after my initial review not one thing has changed. Still pauses, stutters and randomly jumps around the recording. Why no fix Comcast?

Frank-I about Xfinity Stream, v4.2.1