Got both the Renthal ring and Urge Helmet. The Renthal ring is designed a bit strangely as depending on your chain line and bolts you have to put it on "backwards" so you cannot see any of the branding. Not really a negative but if you're going to produce a pretty pimp part you want to be able to show of the manufacturer. Very light and beautifully made, my mate has managed to split one in half but we think he'd lost a few bolt's and Renthal replaced. The urge helmet really does fit perfectly. Unlike a normal XC helmet that feels suspended by the internals, this fells snug all over with no pressure points or adjusters to either pull hairs out or get stuck under the loop on the top of my Dakine bag! I do take it off on longer climbs but as soon as you get any sort of speed, the vents work great. The sweat pad at the front works excellently and the straps adjust easily. As they said, it also feels a lot safer than a traditional XC lid. Unfortunately, as I'm tight I got the cheapest one I could find which is black and white or "Chips style" as my mates call it but the do some cool colour ways that pictures don't really do justice to.