Mustaine, you can't get cramps if you use it properly, i.e. lift your hand when you stretch your thumb - if you don't lift it (or don't lift it properly) you get cramps, sure.
Reschke, you're absolutely right: if ever possible, (try to) try them out - however, the times when you could see them in the shelves seem to have long gone, unfortunately.
And like I said: a controller is more than just the hardware itself.
The design of the HOTAS Cougar is unequalled by any other brand's stuff - it just feels as if it was a natural part of your hands. But its quality is a two-sided coin: it's made of metal, yes, and the long travel of its coolie-hats and the longer throw of its buttons is something you have to feel to believe it - but the gimbals more often than not have center-play, and they wear off too soon, and the stock springs are ridiculously stiff. Last but not least, the support provided by Guillemot doesn't really deserve that name, unfortunately - there's absolutely no communication with their customers, and updates take an eternity, without any guarantee that they'll ever be released until they happen to be released.
The CHs OTOH work flawlessly straight out of the box, without any need for replacements or mods due to high-quality internals - but while their coolie-hats and buttons are of a good quality, they just don't feel that good as the HOTAS Cougar's. CH Products' support however is next to none, and so is their communication with their customers.
I for one wouldn't wanna miss any of my sticks - I love my HOTAS Cougar's ergonomics (read: it doesn't just look good, it feels good) and capabilities, and I love my CHs' softer feeling (read: better fine-control) and capabilities (there are some things my HOTAS Cougar will never learn, unfortunately). I couldn't say one would be better - I only could give you my personal opinion which one is better in which field and for what type of games, for instance.