Well I'd be the first to say that they are definitely worth it. I've just recently discovered them, the AP that is, and have found it has been channeling forex pairs for me with great accuracy. If they slip out of range, it is usually because of my error and after a few moments I see the correction I should have made.
Still learning, but amazed at both how useful APs are an Gann Fans, though I'm still confused a lot on that topic. But the Forks are the bomb. IMHO.
PS Waveslider, I think if the fork had been drawn as Tasuki has mentioned earlier from the first mountain top in that triple peak, the corresponding fork would have nailed it. JMO - for what it is worth, and it seems like it would have been even more accurate.