Recently I've added a Cabela's Euro Riflescope to my muzzleloader. Its only been shot a few times, but I don't know that I could tell you the difference between it and one of the 'scopes that are much more expensive. (Approx. $400 vs. $1000 for the comparables I've tried.)
Despite not yet shooting a buck with one of these 'scopes, I'm quite impressed with it.