Sadly, the keys of the previous "HP15C Limited Edition", which I bought in 2012 - https://www.amazon.com/gp/product/B005EIG3MW https://www.amazon.com/gp/product

Sadly, the keys of the previous "HP15C Limited Edition", which I bought in 2012 - https://www.amazon.com/gp/product/B005EIG3MW https://www.amazon.com/gp/product/B005EIG3MW - were also crap. My original HP11C (from around its launch date in 1981) works as well or better at this point.