They are not that bad but you do have to break them.Popular? I run in the German Draht circles.....and the only two I've ever seen were up in Cranbrook BC. Not sure you'll find another owner on here.
Been enamored by them for years. But I simply don't think I could ever handle one. I like some wildlife around my property. I don't think they'd leave a critter alive that weighs under 100 pounds.