I got one of these today, with uncaged bearings. I have a Shiro F3 and Koenig Arius to compare with. I can flip those both, and flick the Koenig with no trouble. (no blade slot to flick the Shiro). They both drop-shut nicely. Initially I could not flip or flick the iMamba. The blade would stop short of lock-out. On a hunch, I put a tiny drop of Hoppe's 9 oil on the inside of the frame lock where the tang rotates against it. Wow! Flips and flicks like a champ now - smooth as silk. Maybe some break-in time would have accomplished the same thing.
It's too tight to drop-shut. I might be able to do some adjusting to accomplish that, but I like the way it feels now, so I'm not going to mess with it.
The 3 knives all have a different feel, and the technique with the flipper tab is unique to each, but I can't pick a favorite: it's just 3 versions of oooohhh - nice! They each have a unique sound, too. Blade is razor sharp.
It has the mammoth tooth scales which look very nice. My only knock is the lanyard - it's not much to look at, especially on such a flashy knife, but that of course is the simplest thing to change.
How does it work as a knife? I'll never know. I have Benchmades for when I actually want to cut things.