Hohner D40 Concertina Concertina Hohner 49-Key D40-G/C 40 Key Natural

I had read that there was a problem with buttons sticking on this concertina, but the price seemed too good to pass up for a first introduction to the instrument. When it arrived I was pleasantly surprised. It seems well made for a low end concertina. The sound sounded good to me and at first no sticky buttons. But then one started sticking. I'd read of people stripping the screws trying to open it up to fix the buttons, but I was able to take it apart without trouble. I found that the hole in the side where the button slid up and down had a small ridge that would keep it from sliding cleanly. I bored the hole a little cleaner and it's worked fine since. So if you don't mind a bit of self repair, I think it's a good concertina for the price.