Just about the only things I didn't like about the Twitch series (handled II and XL and the Blink) were:
A) A/O didn't seem as fast as I would expect (see Kershaw

).
B) Blade was very ground high and hollow - great slicer, not that great for my purposes as a general EDC (I carry a very small, thin folding knife as a dedicated slicer).
C) COG was quite a ways down the handle - I prefer closer to the index finger or further up.
D) Thumbstud felt "off" to me - not placed correctly.
As you'll notice most of these are very minor issues, and quite subjective in a lot of cases.
Overall: It's a decently priced and very handsome folder, with a decent opening system and a rather cool lockback variant (though I have some doubts as to its strength re: batoning, etc, I don't think it's designed for harder work either way)..
The "polished" blade looks great when contrasted with the handle finish.