Seriously, don't waste money. The first one I got broke after 1 hour of use (and I am particularly careful) - the microswitch on the left button broke. Now I bought another one - only to find that (again the same microswitch) one of the buttons does not work (yes, dead on arrival).
Will have to send back to Vesalia, and most probably incur more charges!
On a side note, anyone knows if these can be easily modded with Sanwa or Seimitsu parts?