I enjoy the show, but I have a lot of issues with it.
First of all, it's stupid how he's supposed to be an expert soldier and infiltrator, yet constantly runs straight towards people spraying at him with machine guns, yet he is never touched by a bullet. They never sell the fact that he's supposed to be good at this, instead of just being blessed by some lucky fairy. I had hopes that they would be more clever about his MO, but this got turned into silly comic book very quickly. You're just supposed to assume that he's some sort of demi-god who knows all and is capable enough to get into and do anything the plot requires.
I also dislike how victimized Olivers mother is. I would have much preferred her to be more involved and convinced of The Undertaking plot. But I guess they would have to kill her off or send her to jail or something pretty soon, which would kill the opportunity for family drama.
Also, it's apparent that the central theme of this show is lying, yet they never reach any satisfying conclusions or comment on the morality of it.
With that said, the choreography is very well done, and I really like the diversity and strength of the cast.
It's visually cool, and while the whole "green eye paint" thing makes no sense, it looks pretty badass.
I think this could easily be one of the better shows on TV right now if they just chose to inject some sense and logic into it.