Aside from the egronomic benifits of a grip, my favorite advantage of the one I have, is the ability to use AA batteries. Old camera from the film days, the specialized battery was expensive and sometimes difficult to find. (some, mayby all) Canon grips allow the use of two rechargable camera specific batteries, or AAs. Likely the other manufactures do too.
|Valley by the light of a blue moon by cjf2|
from Down in the Valley
|Lake Erie Stone Pier by yobbyt|
from Dock or Pier
|Hong Kong by Zephyr1977|