I have played acoustic accordion for years, and the Fr4xI sure did meet my expectations. Very satisfied with the wide choice of perameter control over the Sounds & Bellows. 100% in that respect. (Cons)! The feel of the accordion casing is not of good quality, especially at the outer edge of the keyboard. The keyboard is not fast enough, especially for repeat notes. I would suggest to Roland not to have to depress the keys so far (treble) side. and also lower the height of the black keys slightly (treble). Apart from that I would recommend it AAA+