Handled dreams better than Inception...
My biggest gripe with Inception was that the dream sequences (which was composed of majority of the film) never felt like actual dreams.
They were way too literal, too concrete, and too linear.
For this to be a low budget film, the set designers did a fantastic job with the dream sequences in this film, actually making them look and feel like dreams, from the slow-motion being used to proper effect to convey a sense of molasses (which happens often in dreams, especially when you need to run or flee), as well as all of the distorted images, angles, and oblique structures when things feel "off", and also the transitional phases from one scene to the next that don't make sense but at the same time, feel transient.
Very few films have been able to capture the truly abstract and bizarre nature of dreams, but this film did it well.
It's a shame Nolan didn't take a more artistic approach to the dreamscapes in Inception, because they really could have used a level of creative sophistication as showcased in this film.