I have never really touched the exposure blending feature in Photomatix, but I was having a difficult time getting my pictures to come out after inadvertently leaving my ISO at 800 for most of my Tokyo International Forum shots. Both shots below were 5 exposures each and blended together using Photomatix.
All of my correctly exposed shots were full of noise and the high and low exposures could not be tamed without yet introducing yet more of the same noise I was trying to avoid in the first place. Exposure blending went in there and kick its ass. I promise to post another location next time!