A uniquely presented, hypo-manic love story with intriguing truisms and insights throughout, that is both entertaining and thought provoking. The constant patter, chemistry and performances of the leads literally is the story. Practically no other characters intrude, and none distract. The production and direction fit perfectly and the editing effectively supports the jumps backward and forward in time.
Having said all that, what impressed me the most was the acting. Over the past couple of years I've become interested in the differences between good and bad acting and actors. While both actors were very good here, I found Emily Rossum's performance to be stunning. She made her character so real that I forgot it wasn't, yet it also popped. That's a mark of excellence I've sought. I've read review after review of other performances claiming that various actors disappeared into their characters, but rarely found that to be true. I usually know the actor is doing the work, and hardly ever forget it. Emily actually does completely disappear into her role here. It makes me regret not watching Shameless all these years.