Horrible in automatic mode, Perfect in manual mode
Dont buy this app if you want to simply point and shoot. There is a excellent review in the macrumors forum which compares "HDR Fusion" with "TrueHDR" and "Pro HDR". The automatic mode of HDR Fusion is by far the worst of all of these HDR apps. "TrueHDR" which takes 3 pictures is much better in automatic mode. But if you are looking for manual fine tuning, HDR Fusion produces the best results of all HDR apps in manual mode.
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HDR Fusion, v2.2