Haven't tried it yet but they seem great. My only suggestion is to label the Allen wrench bag and provide instructions. I finally got the smaller wrench to loosen the swivel lock- it was tight! I thought the little wrench would break, but it didn't thankfully. As for the larger of the two wrenches, I'm still not sure what it's for.
I havent ridden in my new stirrups yet but have to say, having ordered from other shops Corro had the quickest turn around. Even enclosed the Allen wrenches needed for adjustment. Cant wait till you carry more Cashel items. I shall definitely make you my go to tack shop.