I think the SB-400 is good for bounce/fill flash but is pretty weak for much else. If your going to use it for a direct flash just stick with the on board flash. I have an SB-400 and an SB-600 and to me the 400 is pretty much useless.
What are some cost comparable alternatives? I have seen a lot of different reviews, but I don't see a conclusive answer. I appreciate all the replies.
Jon
I own and use the SB400.I added an inexpensive Flash cord and now I can bounce the flash off anything.The SB400 is a good close range flash.Good Luck.