I'm a nerd with more money than sense, what can I say! I trust the output of the device I have, and I do truly believe I am burning 3300kcal/day just standing at my desk, walking to the bathroom, etc. I eat 3500kcal/day pretty regularly, and maintain weight.

If you can target enough of a deficit and not be hungry, good for you. It's hard for most people. The input data is wrong, the output data is wrong/unknown, and one can only be hungry for so long.