The real gem of this flick i s the central character played by Oscar Isaac.  There is a dark  albeit comic aura  emanating from this character that is hard not to notice. Splendid acting and flawless dance moves!  The rest of the cast lent great support from the right hand kid to the secretary and the doomed lovers Claire and Nikolai.   Great shots and of course, musical scoring is very commendable. Definitely a must-watch!