The writing is uninspired and clunky, but serviceable enough that I kept plugging away to find out what happens next. That lasted until 3/4ths of the book, before the world building inconsistencies, lack of tension or sense, and overall ridiculousness of the main character made me realize that it wasn't worth finishing. The premise that an assassin can be the best at what he does when all his previous experiences are erased is a joke, made worse by impulsive, I-hate-to-plan actions. He's less an assassin and more a doped-up Wolverine. 
 The slapdash explanations of the sci-fi portion of the book made no sense to my numbed brain, and the main character and his reporter lady friend swallows it with nary a protest. I could go on, but...I won't. 
 If you want to read about sympathetic, smart Asian assassins, I recommend Barry Eisler's John Rain books. Curiously enough, I just started reading another sci-fi book about an assassin whose memory is erased/limited, called "Made to Kill". Here's hoping it's more satisfying!