Summary: A bit on the expensive side but I can say these speed lights are worth the money. If you are serious about photography, you are making a mistake if you don't buy this flash. Amazing quality and impressive recycling speed at full power. Detailed menu is a little much but not necessary if you use TTL. You will not be disappointed with this flash ( maybe a little lighter in the pocket) but definitely a must have in your camera bag.
Summary: I currently own SB600, SB700 and now the SB910, Fantastic flash, I have used it in commander mode in bright sunlight to control my SB600 approximately 25 ft away without any problems, I have even placed my SB600 outside a window in bright sunlight facing the window and had no problem controlling it from indoors with the SB910,