When I met Booker T. Jones, he said "I want one of those!" His only reason for not buying one was because you couldn't split the chorus effect on the upper/lower manuals ...until they came out with this model (the 'c' in XK-3c stands for 'chorus'). Anyway, if his endorsement doesn't convince you, take my word for it ... LOL. The Leslie simulator sounds really great. Lots of times I'm at a gig and someone asks "where's your Leslie cab?" to which I point to my board and watch their eyes grow in disbelief. Other features of this organ are the ability to completely and totally customize the tones AND circuit path including switching the order of the tubes. For real.