I've been the owner of an HTC One for 2 weeks. Up to now I've managed
to explore the phone and be aware of the phone's limitations. It is
definitely an improvement over the Samsung Galaxy S3. The camera really
shine in low light settings. I also used the Night mode at times to get
more out of the Ultrapixel camera.
Below are a couple of shots taken with the camera at different night settings. Drop a comment if you questions.