I really enjoyed this film. The premise was excellent, the casting fantastic and continuity was quite good. As some others have pointed out, as matter from each worlds burns up after a certain period of time in it's opposite, why don't the people burn, this was a little bit of a plot hole. Also, if everyone is poor down below then how are there people dancing on the roof and on the floor in the restaurant in the above-world planet, a bit of a plot hole that was a bit confusing. However, if you look past this, the continuity of the rest was quite brilliant. It was a bit disappointing that it was focused solely as a love story rather than a "change the world" type scenario and how much more this story could have brought to the table however, overall great watch and will recommend to others. Surprised this one slipped under my radar until now. Definitely a must see!