I spent all day Thursday at Disneyland and used my Sensation as my primary camera. I also took my Panasonic Lumix DMC-ZS7 camera (Great little camera).. I have to admit that the photos that the sensation takes are amazing.
I used the stock camera app and was running a non-branded version of the sensation (You will see the exif data says htc pyramid). I am really loving this phone. If there are ever able to put a 3 to 5x optical zoom in one of these phones I would have no need to carry a camera for most trips..