Can anyone enlighten me on the differences and relative benefits of the Green Chip boards on BJ21 and Don's Domain on

Also, how about CBJN vs. TrackJack for current table conditions?

I'm on the verge of subscribing to one of the table conditions services, and would be grateful to hear about good or bad experiences with both.

As for the subscriber-only forums, the question is not just whether to pay for Wong or Schelsinger, but also whether I should pay for either or just stick to the free boards.