I bought it for the first time ever last year, and was extremely impressed. Obviously being in the UK there were no blackouts, so that helped. But I thought it was very good value for money.
The only thing that would improve it is if they went the NFL route and gave you MLB Network too, even if you had to pay more for that. There's literally no way for me to watch MLB Network, which sucks.
But the $80 your team only subscription sounds decent. Bear in mind, the NFL version is the same price. With blackouts (which do apply in the UK because of Sky Sports, the evil empire), I got to watch 8 Steelers games this year. $10 per game. Yay!
But like Westheim said, I'll still get the full subscription, because I don't want to be restricted to JUST Pirates games.