[jjav]

I have a 28S and a 50G. While the 50G is more powerful (newer), the 28S is my favorite.

For programming custom functions the full keyboard is a lot more convenient. The 50G is too cramped, so it was hard to get into programming it, just too inconvenient whereas the 28S was a joy.

Love the clamshell. When using it for programming I lay it flat on the desk fully open. When using it purely as a calculator, flip it backwards and use handheld.

The build quality (except the battery door of course) also feels better. The 50G keys don't have the classic HP feel anymore.

The only real complaint I had of the 28S was not being able to save code between battery changes. I wish it had a backup battery to keep memory while changing the main batteries.

Still have my 28S and still use it most days, although sadly don't find much reason to program it anymore.