It is excellent. I've had it for several years, and they keep getting a little better every time around. The extra picture quality is great as long as you have sufficient bandwidth.
This year they have tossed in some basic DVR functionality, including that jump-to-inning feature. They have improved their multi-view option a little, I guess, but that wasn't a huge draw for me. The other regular-vs-premium feature that's new this year is, I guess, the ability to get one of the radio audio streams over the video stream instead of the TV commentary, which I haven't tried out so far, because Ron Santo is brutal on the radio.
kono