Has anyone on here used it extensively?

never used it, but just seen babe winkleman talking about it on a crappie fishing show he did that aired this past weekend...

I saw it on a fishing show as well, downloaded it for free. I like it.

I guess I should have specified the premium options. The other stuff is free.

I get a premium membership free through my college bass fishing club. Honestly I would not pay for it. There is definitely some good info on there, but it's mostly on large, popular lakes like Kentucky or Guntersville. Half of the spots marked are just some guy pointing out obvious bottom contours, like "main lake point" or something. Occasionally there will be a spot where somebody filled out all the information on their catch, like time of day, lure, depth, cover, etc which can help clue you onto some potential patterns.