I bought the G15 when it was pretty new, had to get the Swedish layout because the Norwegian wasn't out yet.
For me it was worth the money; it has been my only keyboard until I got two Filcos a few months ago, and it still looks very good and works perfectly. The black coating on the caps is still perfectly intact and even though the outer coating has worn off most of the caps they don't look particularly shiny.
As for the macro keys and the LCD; not all that useful, but the LCD+media keys are fantastic if you play music while gaming.
Haven't tried the newer models, but the original G15 is, in my opinion, a decent choice for a rubber dome.
Slightly unrelated note; I also got the G5 with the keyboard and it has been my main mouse for 4+ years now, using it right now and it still looks and works perfectly.