Of course I like the new flash: recycling time is very fast; the extra zoom reach is good; new interface is nice...but is taking time to learn (I already had the SB800 down); gel holder is good (no tape needed!); oh and that head rotates all the way around in both directions!!!... But the SIZE! Bigger, taller and heavier than the SB800--the SB900 does not balance as nicely on the D300. I am a DX holdout because I like the size, and weight advantage of the DX package, and here I go and get a mammoth flash! I haven't explored the light distribution options much, but it wonder if it is just zooming in and out abit more (is there really a difference?). It will take awhile for me to figure out the usefulness of this feature. I only had the flash for a day, but changing the settings for master flash/remotes is significantly better laid out, I can see that I will be willing to change settings/ flash compensation/ manual--output of the remotes...etc much more with the SB900 over the SB800. Now if only if it had a built-in carbon fibre 6ft light stand and built-in 43" white umbrella somewhere in there...I would be in heaven. A sample pix...with 2 SB800 relegated to remote duty.