Don't know a thing about them, except that they are considered a firearm, not strictly a muzzleloader, because they can accept centerfire barrels. That probably isn't an issue for you since your dad has a sidekick, and I think they also can accept centerfire barrels (maybe I'm wrong on the sidekick?). They do resemble NEF guns. Also noticed it is another collapsible ramrod gun. I recall hearing NEF owners had mixed feelings about it. I'm sure your dad can give you the lowdown.

Anyway, I have seen them on-line and they don't look too bad to me for the price. I wouldn't be afraid to try one, especially if yu like the feel of the one in the shop. I just bought a Remington Genesis which is really made by Traditions, on sale for less than half price from Cabelas. I might not have bought it if I knew it was a Traditions gun, but now that I have it I have no regrets, and it shoots very well. So don't worry too much about brand names.