I'm still getting used to the arrangement of the buttons for the multimedia functions. In general, it outperforms the Ergonomic keyboard 4000; nonetheless, the primary drawbacks are at the level of addiction; after all, I used the Ergonomic keyboard 4000 for a decade. Already present in the subcortex in the places where the buttons ought to be. The size of the buttons, on the other hand, varies slightly from one another. To a large extent, content.