I've got a Helix Paddle Clutch on mine:
I got it off eBay ages ago along with a lightened flywheel for silly cheap so I can't comment on the price factor.
Usability I have no complaints, it never slips, it can take a few goes to get used to it but nothing horrendous.
I believe when it's showing signs of wear you can send it back to Helix and they sort it out for quite cheap and this makes it more of an "investment".
You can get the organic versions which I believe feel like an OE clutch, a few people are using Helix stuff on here and I have never heard of any issues.