Too bad you don't have any experience with programming. If you did you'd know that bugs are inevitable. I have seen nothing in PENG that I think is "sloppiness". Considering the size of the program and the fact that it has to work in Windows I think they've done a very good job. (The lack of programmability of the 4th firm button is clearly more involved that they are letting on and is not just a bug. I suspect there's a firmware or hardware bug on that one.)
Barry