The milling on the side of the thumb plate is sharper than I expected, but it does grab your thumb and make opening really easy. Otherwise it's perfect. Honestly this is one of the smoothest manual folders I own, and the marbled CF is gorgeous, it basically shimmers in the light.
It's absolutely worth it to me. I'm pretty new to autos, since I just moved out of NY, but push button autos don't really excite me, I'd rather just have a well executed button lock flipper in that case. I like the odd autos, like the ProTech Magic autos, and D/A autos like this and the Benchmade Serum. I also remember seeing a Blade HQ video in which Dave, the owner of ProTech said that the Harkins is the most time intensive knife in their lineup to make.