I've had a couple, strength is the last thing I would worry about if I were buying a new one, I think they were all good. My biggest consideration would be stock dimensions.
The only issue I'm aware of with them is poor ejection. Sometimes a new ejector will fix it, sometimes the problem is the left extractor, it has a long tail which can crack, or I suppose it can wear, but it isn't obvious. When this happens, empties just sort of dribble out the ejection port. Its an easy fix, but you'd be surprised how many gunsmiths fail to figure it out.
If I saw one I liked and had the money I'd just buy it, I think they're wonderful guns.

Tim