Hi Jason,
A friend and I built a few of Gils designs. We built three ( white design) river canoes and the puddle duck.
The puddle duck packed with gear seemed to plow more through the water (flat water travel) when tripping which made it seemed slow( just MO). Don't get me wrong, its a nice little canoe.
I have a few books by Gil and find them easy to read and understand. Nice part is , he's very approachable. I called him and had a nice talk with his wife when ordering a book. If your having a problem with a project you can call him up and he will help you through it. He's been a Master Maine Guide for something like 40 years so he knows what he's doing.
Makes a lot of his own gear , from canoes to wannigans to reflector ovens. I enjoy his books.
Regardless of what you use it for, you've got a nice little canoe built by a relative, hard to put a price on that.