Experience with Singh-Ray split ND filters?

I wonder if anybody on this list has any (positive or negative)

experience with the Singh-Ray split ND filters which are offered

trough Galen Rowell.

Just a little, as mine are pretty new. I have one regular and one reverse grad. I've been out on one shoot with them and found them pretty effective, good quality, and easy to use. I just hold them in front of the lens hood by hand, but they'll fit in a filter holder if you want to use one. (Make sure to get the size filter that fits your holder--I got Cokin P size.)

I have used a Singh Ray gradual 2 stop filter for about one year now, my comments are located in the metering section of this page. This is a much more neutral filter than the Cokin graduated grey filter I originally purchased and this is particularly important with high color-saturation slide films.In short, I am very pleased with this filter.

I used the filters on a 10 day shoot in Zion. Worked great. Worked with a professional on a very difficult shot that I wanted. Outstanding result. They cost a lot but you get what you pay for.

They are color neutral and large in shape which permit placing the gradation exactly where necessary. The only problem is that they are made from optical resin and they scratch easily. Especially if hand held like most professionals tend to. Tiffen makes grad that are made from glass and are color neutral as well. If you only need standard grads they are great. The benefit to Singh-Ray is that they have soft and hard graduations in different stops. I like mine but wish they were made of glass.

First of all, the filters can be purchased directly from Singh-Ray in Florida. Galen Rowell apparently began the ND grad craze with the book Mountain Light. I've fallen for the craze, myself. I used to own the Cokin P ND grad but it (fortunately) got stolen with all my camera equipment about a year ago. The Singh Ray hard edge 2 and 3 stop ND grads are the ones I presently own for low light photos at the coast here in California. The transition zone of the hard edge grads is only 5% of the total and I put it just below the horizon when shooting seascapes. Singh makes 100mm wide versions as well for wide angle MF work. These will not fit the Cokin P holder but will fit a Lee (I'm told) or HiTech holder. I'm very pleased with the color rendition--they are truly neutral.