Lee 4x6 colored filters

I am quite happy with their h&s GND's and have now been looking at the various colored filters available and was wondering if anyone out in POTN land uses them. I haven't found to much info on any of these and before spending the money, I would like to feel confident that it will be something that I would find useful.

Adorma (as well as B&H and others) has many different sets (can also be purchased as individual filters as well) shown here: http://www.adorama.com …hinfo=lee+4x6+f​ilter+sets

I was particularly drawn to this set: http://www.adorama.com​/LESS.html which is the Lee 4x6" Sky Resin Graduated - Hard Edge - Filter Set

Any thoughts or recommendations would be appreciated.

I have some on backorder through Adorama. If no one else posts in the meantime, I'll update this thread once mine come in. Only using the Lee ND/big stopper/polarizer now.