Starkeeper, The action on the WK's varies really. The WK's have larger keys than the PSR's, and they also have a longer throw. However, some models (basically again you get what you pay for) over time tend to develop a little buzz noise from the keys. Mine has been infected with this on a lot of the keys. It's not really bad, and you get used to it after a while. It doesn't affect play, or isn't so loud that it will drown out the keyboard sound. Basically if you're a classical player and you play a lot of stacotto it may bother you. However there are a lot of beginners who bought the board and really don't seem to care about it.

Squeak