I LOVELOVELOVE mine. I got them for Christmas this year (: so I've only used them in 4 events now, but so far I'm kind of in love.
They seem to protect super super well, I fell off at my last event when my horse jumped halfway over the fence and stopped, dumped me, and landed with his front legs tucked under him on the fence. Pulled himself off instantly, no harm done, but his legs were no worse for wear after that, although he was scraped up a bit on his knees. I was impressed with the boots (: Highly recommend them!