I have one. Two, actually, as the first one broke at the end. Apparently, it was a problem with the batch they put together, and they sent me a replacement without my even having to ask. Their customer service is amazing.
The stylus itself is great, but I find I rarely use it. I'm too lazy to actually pull it out and twist it around my finger when there's a stylus right there in the DS Lite (the lite is also lighter, making the regular stylus less of a hassle).
IGN had a review: http://gear.ign.com/articles/701/701023p1.html
. They liked it quite a bit. 9.0. Here's the end:
So, as a final wrap-up to this somewhat bizarre review, can we really recommend a hunk of wire and rubber to gamers everywhere? You bet we can. The stylus is relatively cheap at $5.99, with shipping around a buck. The control is well worth the change, and though there isn't really anywhere good to stick the thing while not in use it's still worth the hassle of carrying around a single stylus in your DS pouch or pocket. I personally would love to have the option of a premium product, offering thicker wire and metal endings with the standard stylus tip for a $9.99 price, but as it stands the Comfort Stylus is still leagues above any alternative. Don't get suckered in by random 3rd party stylus packs. If you're truly serious about your game, the Comfort Stylus is the only option.