Blue Diamond...
I Have been playing with Blue Diamond now for a few months (about 3-4) Prior I used nothing but Triangle. Truthfully, I do notice a difference. Worth the money? Yes for me. I don’t chalk as much as I used too, and my miscues have gone down considerably. I like it, and that works for me. I’m actually excited, and looking forward to testing it out, and do plan too, once I can afford to get my hands on a piece, Maybe I’ll get lucky and find one in an empty pawn shop case or something!
If Kamui did a special where they agreed to send 1 Pc of chalk to ANYONE, as a (try it out), based on the conditions that:
Pay the full amount for 1 piece, as a "deposit", then after the given time frame (how ever long the "Lifespan" is predicted for the product based on regular play rate), write a consumer review on the product for feedback, and receive 2/3rds your money back upon completion. I’d do it!