I love it
one of my favorite channels, but I'm an NFL junkie
when ESPN is playing some bullshit I can always turn on NFL Network
yeah you got the Thursday night games, but you can also watch all the preseason games too (they're not all live, but you can watch em)
they re-air classic games all the time, have NFL replay where they replay games from the past Sunday
I watch NFL Total Access, NFL Gameday over ESPN for my NFL news and highlights
and also like scary said, during the offseason it's cool to watch because they have in depth draft coverage... showing the combine etc...
not sure how much it will cost you, I have Dish Network, so it comes with it automatically, but I would say it's worth it if you're a big football fan, just IMO though