pros:
swipe UI (duh)
Meego Harmattan's simplicity , beauty and coherence.
looks of the device
1GB RAM (outstanding, TRUE multitasking)
good camera (especially macro photos)
fantastic music quality through headphones. (very loud, clear and bassy)
decent battery life
fantastic screen with vivid colors and perfect blacks (Clear Black Display)
body paint does not come off with use
great acoustics (both earpiece and microphone)
dual led (makes great flashlight too)
great community behind it (TMO)

cons:

feeble loudspeaker
takes time to boot
usb port and sim tray are badly engineered (especially usb port)
just "good" video. could have been much better
no HDMI out (just TV-out)
not many applications
looks great, but most people will think it's a f***** Lumia :/
will get you mad thinking why this brilliant OS was abandoned