The color was fine, but even on my 10mm lens the gradients of the soft grad and reverse grad were all wrong. I had to shoot in portrait position just to get the soft grad started on the bottom of the frame and dark at the top. That was not acceptable for most of the shots I want to take. Completely useless in landscape positions, even for 3 stops, .9.
The reverse grad was pretty much useless as a reverse grad, since the top portion of the filter did not fade at all unless the bottom line of the ND was at the bottom of my frame. It was effectively a hard edge grad that cost 2 times as much as it should @ $190.
I've been following Patrick Smith and he uses the Lee filters a lot. His photos are my favorite landscapes out there, period. He is able to make those suckers sing!
The Singh-rays have great color (or lack there of) and build quality, but they just have the wrong gradients, IMO. Even on 10mm they were useless to me, really. 
Lees are top-end and they cost half the price. No brainer!
Check out Patrick's Flickr. This dude is a landscape machine! 
http://www.flickr.com …4888963745/in/photostream