I have a HHKB black on black keyboard and I typed pretty well. At times I thought I could even type without looking. Feeling extremely confidence, I bough the black white-grey caps and fitted the HHKB with that. While I could still type, I had a lot of stress because there were many times I made mistakes. The subtle stress made typing no fun and I realise I have a lot to learn. Swap it back to alphas and I am totally confident again. But blanks caps are so beautiful!