It is entertaining, funny, thrilling, exciting, even though it is fictional story the characters make it more believable. I felt the actors where all cast appropriately for their parts. The whole story is well paced, with very little lag, no real boring parts. The romance between Simon an Emma is quite complicated, awkward, funny, romantic, distrustful, and then finally trustful.
The only part I felt that I had little hard time with was Simon gaining Emma's trust, that was awkward and a little unbelievable, but I will let that one go as there are few other areas where "artistic license" is used such as the blowing up of the Range Rover and only the Russian Mafia getting hurt but not Simon.
Over all the movie is fun, I enjoyed it; this is one of those movie that I don't mind watching over and over again.