Calculators you regret buying?

[Gjermund Skailand]

I have extensively used both HP42s, HP50g and nowadays DM42.
For larger projects I find debugging to be much more effective in RPL provided it is used properly with many small snippets, and building library.
I find System-RPL to be much cleaner than RPL.
It is also easier to break down the main program in small pieces.
For me, RPN quickly turns into "spaghetti".
And on a final note, with HP50g and programming in C it is still much faster than DM42, especially for cases when I don't really need a lot of digits.
BR Gjermund