Plus:
Stainless steel mug (probably will not leak).
Cooking process quickly.
Minus:
A bit noisy.
Cover hakelig, handed stuffing becomes impossible.
Due to the cover design the device drips when pouring meaner.
Addendum 2012 (almost 3 years later):
After 2 years the unit still works with the mentioned advantages and disadvantages.
Search a device to my old mother, because it is because of the hot Edelstahlgehaeuses
and not suitable because of the drop when pouring.