For commuting they are fine, but you can set them higher and closer than you might on a racing bike. Put the brake hoods at your favourite hand hold and you will have positions more upright and more aero to chose from.
They come in different sizes, both the width and the radius of the drop, so dont get them too big.
The only problem I can think of is that people with small hands have problems with the reach of some (most) brake levers. The low-end Shimano levers (Tiagra or Sora ?) are better suited to small hands.