I have used Goldtouch for almost four years, starting with the old PS/2 model with good layout (Home/End/PageUp/PagDown on the left side). Overall I love this keyboard a lot since it soothed my RSI. However the rubber dome switch doesn't feel very well (I don't feel tactile, but still better than other keyboards), after couple years of using, the wrist/finger pain came back recently. Guess I become too picky now.
Too bad there is so few ergo keyboards with mechanic switch, wish Japanese vendors can make one some day.