I got the paid for version and like it very much.
I was having trouble installing it on my off line work station, and they offered to call me in Wash, DC from Singapore to help out.
With excellent tech support online, that wasn't necessary.
I previously used ColorBlender and was pleased with it.
One significant difference between GenoPal and ColorBlender is that G-Pal can be set to generate a different number of coordinated colors with different display settings (4,16, or dozens). I find this option very helpful.