I have a whale tail on my boat. I'm pretty happy with it, although I've read here on iBoats that it's not as good as trim tabs for getting on plane quicker.
I can't really comment on what it's like to wake board behind it on my boat, since I haven't yet gotten up on one (yet!) but when I churn it up for tubing I'm surprised at how big a wake I can make. Of course I have an old, heavy in the rear IO working for me.
