For those of you (like me) who use this to watch games, there are some really cool changes to MLBTV this year.
AT BAT is included this year in the premium package. it also gives you home and away broadcasts and some other cool stuff.
If you subscribed last year, and are set up for auto renewal, if you go into your account seetings and click the audio/video subscriptions, they give you a $5 discount on MLB premium if you had regular last season.
If you use AT BAT the premium is the way to go. for the same price as regular +atbat, you get the app (not sure if you can download for iphone and ipad or its just one application download) plus all the features of premium listed above.
editors note: Looks like the only way to watch games over streaming devices (app enabled tv's, apple tv, xbox, etc... this year is with the premium package, so if you're viewing that way, and are already a subscriber, make sure you upgrade!