I had a short-term subscription to Sling as recently as last year to fill in some gaps. I don't remember noticing a picture quality difference relative to YTTV, but the interface in general was a bit clunky. Probably would have irritated me a bit if I used it as a primary provider, but manageable. The nice thing about Sling (like YTTV) is that you don't have to sign up for a contract. It's month-to-month, if you don't like it, hey, it was only a month.