I have owned a custom AD-10 and still own a custom AD-15. Based on the CS 4-Max I have, I put my AD-10 up for sale and plan to replace it with the CS AD-10.
After I get some time in with the CS AD-15, I may sell the custom.
Andrew and CS are doing a great thing for general knife people by providing a high end custom design in a an affordable production version. My CS 4-Max is every bit as good as the custom AD-10 I owned.
If told I could only have one folder and I had to use it for everything, I would choose the 4-Max over every other production and custom knife I have.