Highly recommend Sunday Ticket on PS3 for one reason:
You can pay monthly. I paid $85 (it's $340 total, 4 monthly installments of $85) for the first month when the Cowboys had a game that wasn't televised locally for me. However, the whole next month, they had games that were either national games or bigger games likely to be televised in my local market. So, I emptied my PS3 wallet, which is where they take your $85 a month from. Then, when they went to withdraw my $85 for the next month, the service automatically cancelled because there wasn't any money in my PS3 wallet. About a month later when the Cowboys had a game that wasn't going to be televised locally, I purchased the service again, paid $85 for the month, and did the same thing by removing all funds from my PS3 wallet, and the service was automatically cancelled again when it went to renew for the last month of the season. Every Cowboys game for the rest of the year was televised in my local market, so I ended up paying only $170 for the service to catch the 3 or 4 games that I would have missed. I'm not a big watch-the-game-at-the-bar type of guy, so this was WELL worth it for me.
Only a matter of time before they figure out a way to prevent people from doing this, I'd imagine, though. Hopefully we'll get one more year out of it.