The Chromatic Button Accordion predates the Piano Accordion. The Piano Accordion was an idea by Hohner to see more accordions. Its actually quite silly. I started playing a piano accordion and for a couple years it was fine because I did not really know how to play. But soon I reached the limit of the piano accordion (I am playing Irish music alot). Since I am repairing and tuning accordions I have access to inexpensive kaput boxes. So I got a B system Paolo Soprani on the cheap. After an overhaul I gave it a go. It was much more intuitive and fast. Also having the scales and chords stay the same pattern make is easy to transpose songs. Even very complex ones. I am still tuning and repairing piano accordions and I even have a couple hanging around. But when I strap it on and start playing it feels like a waste of time. I would urge everyone to sell their piano accordion right away and pick up a nice Chromatic Button Accordion. If you have the option to try out a couple different systems that would help a bit. But I feel that it doesn't really matter which system you choose its really just moving your fingers about and pushing buttons. I have used the B system and the C system I do prefer the B system since I do play alot of chromatic steps in my music and it is a bit more natural for me. But it may also be that my Paolo Soprani is B system and the C system I have is Swiss. But in reality since I am playing Irish music I have again switched to the B/C Diatonic. But it still hard to put down my B system accordion. Anyone wanna buy a piano accordion?