Have this in my to watch list for a while now as I am a big Christopher Nolan fan. He is one of the best writer directors this country has ever had imo.
Sometimes Nolan’s movies really make your brain work overtime while watching them.
I read several reviews saying that you need to watch it a couple of times. His movie are never run of the mill imo. I will definitely be giving it a watch.
I never trust early imdb reviews, good or bad, and as as @avid has said, Nolan movies aren't your usual brainless action fodder. They tend to confuse the hard of thinking. I'd give it a week or two.
...and don't watch a download ffs! His movies need to be seen LARGE.