Others have already covered this to one extent or another, but the BTN is great.
YES, there technically can be instances where a game will be on PPV - but only if you're on the road and playing against a team that won't warrant coverage on ABC/ESPN and won't lease the broadcast rights to the game to the BTN. That's really more of a concern for fans of schools like Indiana, Illinois, Minnesota, etc. If Nebraska schedules like Ohio State does, the only OOC road game you schedule are marquee matchups that will be picked up by ABC/ESPN without a doubt.
It has also been mentioned that there is a guaranteed number of games that will be on BTN. That is also true. Each team will definitely have at least two games on BTN each season, and one of them will be a conference game. Sometimes too, the BTN will exercise their conference game option for your team in a pretty good matchup. Off the top of my head, I can think of at least one Ohio State-Wisconsin game that has been on BTN - one that you would normally think would be a lock for ESPN/ABC.
The overall TV deal is great for bigtime fans, which it appears Nebraska has no shortage of. I live in Cincinnati, so getting the Buckeyes every week is no problem. If you live outside of your schools regular viewing area, the options and availability are going to be much better than they ever were before. You can count on every game being broadcast nationally. As has already been mentioned, even the games that are regional on ABC/ESPN are mirrored on one of their other networks, essentially upgrading the regional games to national distribution. It's something that the other conferences don't really enjoy in their TV deals.
It's also great if you travel. I went to San Antonio for a week last year, and was still able to easily find a place to watch OSU-Indiana. As a bonus, I even got to see M*ch*g*n choke against M*ch*g*n State - all on BTN. I'll be out of town for the OSU-IU game again this year (if you have to pick one game to be out-of-town for, that's the one) and have very little doubt about being able to get my Ohio State fix while I'm in Hawai'i.
Finally, this being my first post here, I want to say welcome to the Big Ten! I've always had respect for Nebraska and especially the fans. I've always been impressed with the way Nebraska fans travel, and I'm sure I'll be seeing you guys in large numbers at The Shoe really soon.