It's kind of the all things in moderation issue. You can't live on the stuff but if you are out on the trail and have an injury? You bet it can be good. It is better to stop inflammation early (no ice out there!). 4 knee surgeries later I use it prophylactically. It can mean the difference between riding only today or today and tomorrow. Though the stronger my legs are the less my kneecaps scream - funny how that works.

Long term use is the real culprit and a big no-no.