I have it and you're right: the directions could be better and getting what you want takes persistence. I managed to change the wheel size and got the display I wanted: cadence as the big display. After that I lost interest in figuring out how to change the time to the proper zone but, I'll be golden if I ever move to NY. Also, it's not obvious but once you're set up there is a button (the 'dot section' at the bottom of the face of the unit) that toggles between the small displays--e.g., speed, odometer, trip, etc., and you hold it down to reset. Keep at it: you'll figure it out. Set up aside, I like it.

Taking a look at your manual sort of refreshes my recollection--e.g., setting the upper display: Menu-Menu-Menu, etc. until you see the big "zero" on the top of the screen; and then, Mode-Mode-Mode, etc., stopping on for example "CD" and, finish with the Menu button to register the setting.