I've seen Acta manage up close more than any member of this board can say, since he managed both winter leagues and managed a WBC team, the man is a brilliant manager, but i will say he has his problems.
Bullpen management is good, lineup construction is good, he's not afraid to sit players who aren't producing, and he can become a media darling, but some in-game decisions can be head-scratchers, (bunts, straight steals, etc) in situations that really make no sense, he's also prone to burning out bullpen arms he likes (like Torre).