Originally Posted by Sheldon Brown
The adjustable stem is heavy and clunky, and once you figure out where the bars want to be, you really don't need the adjustability any more.
OTOH, you can probably get an adjustable stem for very little money (I can get one for about US$15 here), so you could get one, find your preferred position and stem length/angle, then buy a proper stem with correct length and angle.