In reply to Chris Aston:
Topic has been done to death, so I can't imagine you'll get much of a response.
Say something controversial, get the ukc juices flowing!
Anyhow, in answer to your quezzie, the three friction labs chalks are the same, just different consistency. Either fine, chunky, or super chunky. Does the same job, just depends how you like your chalk to come.
I like it, it feels gentle on the skin, I didn't feel the need to chalk up as much. I think it does work. But the price tag is crazy, and the effects could be in your head.
I've used metolius super chalk before, which I like but it messes with my eczema as it has a drying agent. I'm on moon dust at the moment, which I'm getting on well with, and will probably stick to now.
Is friction labs good? Yes. Is it worth the money? Probably not.
Try the small sample size and see for yourself, and assess whether you bank balance can take a pounding on a consumable like chalk.
Hope that helps.