TexasMoonwrote a review of Thule Canoe Carrier on April 2, 2007
The shoes not only keep the canoe from shifting, but keep a great reference point for balancing the canoe back on top. The straps that come with the kit are awesome - quick tie down ratchets that work with a single touch. A lot of thought and experience went into the design of this system. If I ever find myself having to tie a boat down the old fashioned way, I'll be sorely disappointed.
If you have a canoe, this is money well spent.