Had a Laam seat on my C14, and my observations were the same as the OP. Constantly sliding forward out of the pocket, and the material was either too hard or too thinly padded. I ordered a touring seat from my dealer for $482.00, and I am much happier with it. Nothing at all against Seth, he makes a great seat, and his seat was much more comfortable than the stock seat, but it fell short of what I needed.
No more sliding forward, and the seat is quite comfortable.