I had the fever for a Shiro a year or so back. Was able to snag a CKF MILK for well less than half the price, and it completely scratched the itch for me. Not saying it is the same, but I
am totally saying is has blown away
every single person that has flipped it. Forgive the crappy iPhone4 video quality, but this is mine right out of the box. I've dialed it in to be just slightly less free-falling since then, but it practically feels like it is mind controlled. Detent is not nearly as strong as XT's and recent XM18's, yet it is really impossible to break detent and fail to fully deploy - there is essentially no perceptible friction in the pivot.
In the end, I have been around higher end knives enough to know you are getting something for your higher price in a Shiro as compared to my CKF MILK. I'm just not sure the differential is, for me, perceptible. I cannot imagine objectively better flipping action, and with a nearly sterile (only a small "M390" on the tiny flipper tab) hand rubbed blade of M390 (with 4.21" cutting length) in a 4.3 ounce titanium framelock that is .433" wide, my Russian desire is satiated.