The coverage has been pretty good on both ESPN and PokerGO. If you're only interested in the Main Event final table, ESPN's coverage will be sufficient. If you're interested in any of the other events (or the additional Main Event coverage), you'll want to subscribe to PokerGO. There has also been
wsop coverage on Twitch.
FYI: PokerGO has a 30-day free trial. Also, you can get $10 off if you use code WSOP.