It would not be fair to compare the CT-S500/1000V or any rompler from any company to a dedicated organ clone. On the other hand, some of the organ tones in the CT-S500/1000V are certainly useable where organ is not going to be the featured sound. The rotary effect is pretty good and there are a good number of tones to choose from. But the one thing that will distinguish a rompler from a real organ every time is the percussion. On a Hammond the percussion is polyphonic single trigger. When a key is pressed, or multiple keys as long as they are played at the same time, the percussion will sound the note or notes and decay out. As long as at least on key is held down, newly played keys will not trigger the percussion sound. On some romplers it helps to gain a bit more realism to assign a percussion sound to a layer and set that layer to monophonic. this won't give you the poly/single trigger of a real organ, but at least when you do a slide up or down the keyboard, or hold a key while playing other keys you won't hear percussion on every keystrike. How hard would it be to add a polyphonic/single trigger mode to the O/S? Maybe there's just a small number of folks who know or care about this. If a feature like this was included it would definitely make the instrument stand out from the crowd, or maybe not.