Cutting the cable, lets talk options and media setups

I am glad that I am not the only one having problems with skipping, lagging, and pausing with ESPN (on Sling). I watch ESPN on my work computer, but it always has those problems, and it gets frustrating. I imagine that they will correct this problem as time goes on, but it is annoying.

I have the stick, and not Roku. Is Roku necessary at all, or should I go and get that? How much is it monthly btw?