Sling was pretty good, I like the interface better than PS Vue. Vue wins out for us because it seemed to have better channel selection (not sure how much that has changed in the last year or so) and the access to some shows that are saved to your list (poor mans version of DVR). Both are pretty good for what we use them for, not heavy watching, mostly just so we can watch ISU/Iowa play.
Vue lost all the Viacom channels which pissed a lot of people off.