just received mine, not used it yet except just around the house.
Impressions?
1, looks great and makes the camera HUGE!
2, adds quite a weight to the camera = stability
3, makes the camera more comfortable for my hands as they are quite large and the extra leverage takes the pressure off my little finger somewhat.
4, feels more stable when steadying with my other hand..
all in all except the extra weight.. it feels right...
i'll tell you how i go once its used in action!
oh.. the bad side?
i now need a new back as the grip and the sigma 28-70 2.8 wont fit at all!
Thanks
Steve