Technically the images look great, very impressive. Production-wise I can also see how this could be useful for low-budget interior dialogue scenes where you don't want the set dressing to distract. It really draws focus to the actors and lets the director paint a more impressionistic backdrop.

The exterior shots I've got more mixed feelings about. I think these shallow lenses work best when you have a very controlled backdrop that can be deliberately staged. Using it in a wide outdoor shot feels like a real risk unless you're doing some Kubrickian blocking to make sure everyone is arranged just-so. Or you're making them stand stock-still.