Right now they have at least one team in every league in the US except for the AZL/GCL levels. They are getting a lot better. Heck, three of the Reds four full season teams are now on Milb.tv. Only Bakersfield isn't and there has been discussions with them to get in on it, though it may not happen.
I've already made my mind up, it's something that I will renew, I've gotten my money's worth :)