Had about 40 'bills that I made before they vanished (stolen) from my garage quite a few years back along with some Mallards. Personal advantages - no 2 looked alike every head position and pose was different, after being balanced and with a proper keel they rode the heavy water better than any synthetic, and the best was that they were my creation - nothing like shooting or catching something on/over something you made, flyfishermen will totally understand. Only disadvantage was that they are heavy (great in heavy water though) and bulky but those 40 usually would out draw 8-10dz synthetics. They also take up less room than the 10 dz synthetics I've lugged around since. Store bought corkers look generic to me and are way overpriced.