Well so far Sling not that bad. ESPN has its skips but I do find it works much better when you put your sling info on the Watch ESPN app. Also likes how Roku lets you build your own channels and has a couple of free movie apps. So far so good.
I ran in to the skips when I was using Sling but I think it may have been due to my modem/router which I have upgraded. I am thinking of re-activating the service to watch the new season of the Walking Dead starting next week. Plus it'd be cool to catch some MNF.
I will also mention I have been using the Roku to stream Sunday Ticket and it has been streaming in good quality.