Hi Peter, The simple answer to your question is the unfriendliness of the Tyros operating system, compared to the Technics KN range. It's not just unfamiliarity - I've spent many hours, trying to come to terms with it but just cannot work up any enthusiasm for it. Also, I don't like the 'feel' of the keys, compared to the KN7000. Trying to edit styles or sounds is a bit of a nightmare, again compared to the KN range. However, I must admit that some of the sounds and styles are good, although the 'Grand Piano' isn't one of them......
Just my opinion and experience
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I made a mistake in buying it and I'm not afraid to admit it
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Willum