My chain is a bit too long since there's no bottom roller on the XCX so I need to take a link or two out. I have had the chain begin to derail when pedaling backwards over rough terrain (setting up for a corner, etc) but it always re-aligns itself as soon as I pedal forward again. I trust it 100% though. Considering how much lighter it is I think a tiny sacrifice in chain security is totally acceptable. And like I said, thus far I haven't actually lost a chain. I say go for it.