After constant buffering with DTV now as i stated on another post, I tried PS Vue. It is awesome, very little to no buffering on it. PS Vue does not have viacom, but that is ok with me. Hope this helps others deciding between the two.
I think they still have a little ways to go on that service. I don't think it's been out very long. Seems like the services that's been up for a bit had time to sort out all the kinks. Even with a cable connection I saw a lot of buffering when doing a free trial.