It seems that none of you people have really worked with either Photoscore or any alternatives.
I personally haven’t tried SmartScore, but any version of Photoscore has proven to be hardly usable for me, to say the least.
You certainly don’t want a software that makes you correct gazillions of mistakes, taking up more time than it would take to just quickly input your scores. Or a program getting even the basics of a clearly scanned printed score wrong (e.g. how many lines per system).
I am quite surprised how little research and development effort has been put into music OCR compared to text OCR, which seems to be working rather fine by now in most cases. Actually noone I know of actually uses any of the music OCR systems, although for many of them (including myself) they would be awesome tools of they would just work properly.