I've had Discoverys now for several years and I absolutely love them.
I have always used them for off road.
The only problem:
Last year I had a bit of a disagreement with my bike about a ditch and ended up with a metal rod in my leg.
Sadly, the paramedic had to cut my boots...
I keep wondering if I had more of a motocross boot if things would have been different.
I'm considering getting the Crossfires for more protection.