I wrote a song once but luckily took it back within the full refund period. It was o.k., a few minor bugs, but didnt gel with my workflow, so i decided it was just not for me.
With the cash i bought a calculator and a stick of gum. Couldn’t be happier with my descision.
I think the best thing would be to go to a store and try one out to see if it works for you.