The overwhelming theme I get from reading this and many other threads on Kamui chalk is that most people who have tried it say it is better than any other chalk, and those who haven't say it can't be any better than other chalk.
But it isn't that simple. Everything is relative to expectations. If you follow sports, you've no doubt seen coaches who finish with the same record, but one gets fired and the other gets a raise.
One chalk being 'better' is equivalent to both of these coaches finishing with the same number of wins. The absolute is not really relevant, only the relative, and only relative to expectations.
Business is about expectations, rather than sheer quality. If a $5 item seems to exceed expectations, it can be rather mundane and still outsell a $500 item that is of far better quality, but has nearly unattainable expectations.
Marketers understand expectations, but many do not understand the backlash of raising expectations to levels that exceed their price point. Go to any review site, and the negative reviews will be of two kinds: the ones where the product simply doesn't work at all, and the ones where the product doesn't work relative to expectations. This second one is far more common of the two.
Overly positive expectations are more harmful at times than the negative ones. In the case above with coaches, it is high expectations that get them fired. Many coaches have had very mediocre, but long careers because they kept expectations low, while many coaches have also had very short careers because expectations were too high.
I bring up coaching in this analogy because coaching is an indirect activity, as they don't actually play the game. What tends to happen, then, is they get direct blame or credit for this indirectness. For example, a team may have an easier than normal schedule and rack up a long string of wins. The coach gets credit for these wins, even though he may not have done anything differently to cause them. However, the expectation that he had direct results gets passed on, and his team's future performance gets graded against these new expectations.
That's exactly what happens with something like chalk, which is similiar in that it has an indirect intermediary between the action and the result. As a coach may get the dreaded 'genius' label that he can never really reconcile, $25 chalk gets an expectation level that it can never attain.