I began play keyboards with patterns 25 years ago, I began with other different marks, but from the SOLTON MS5 I played always with SOLTON-KETRON, (MS50, MS100, X1, SD1, midjay, midjay PLUS and Audya). For me keyboards KETRON are the best, the sound of styles is like a band playing in live (others keyboards of styles sound like a studio record, (the sound is no live performance, "not creible", it's a different concept, but for me this concept it's not good for make live music). The problems?, I have not problems with my Audya, I play everyday with it, single registrations are speedy, the sound is realistic, vocalist is great, I'm very glad with Audya. Regards