No, I haven't had to yet. My hands stay pretty warm if I'm hiking and if they're chilly in the AM I wear the wool gloves. I mainly got the mitts for camp and dipping water. I've only got them just this past Thanksgiving and have hiked in rain maybe twice since then.
I use just a hiking staff with a medium soft rubber grip but my guess is the mitts won't hold up to day-in day-out gripping a staff or hiking poles but who knows? That Frogg Togg material is tougher than it looks.
Skids
Insanity: Asking about inseams over and over again and expecting different results.
Albert Einstein, (attributed)
I use GI Neoprene gloves, they work great, and not too expensive.
I've got a couple pair of those basic OR mitts that have worked fine, but I'm playing with sewing some silnylon ones to see how they do.
I second this! 1.0 OUNCE! NOT a heavyweight durable mitt at all. So forget trailwork, logging, etc. But if you're looking for Water & Windproof, extremely lightweight shell to put over lightweight quickdrying liners this is your mitt. Bought a pair at Neel's Gap on last years thru hike and still have them. A little tattered, but so light I always bring them along as ace in the hole. Have used them to warm up hands and/or dry wet gloves all winter long on serious hikes in VT and the Whites. I have used them when carrying logs, firewood, etc, though I don't recommend it as they don't like abrasiveness. But I still haven't worn a hole in mine. Bought a second pair ($20) to offer up to friends as perfect backup mitts for those who just can't trust them as primary mitts. Can't say enough about them!
FedEx