I have a G5 and G15
I love both of them. I was considering the Saitek keyboard for a while, but got the G-15 instead. it just has more on it, plus looks better IMO.
I have my PC next to my bed, so often before I go to sleep, I have Itunes on, with my headphones, turn the monitor off, and use the keyboard with the LCD to control my music and let the PC fold
I also love my G5. I don't like wireless (because of batteries, and a bit lower response) so I didn't get the G7.
the only thing I don't like is the fact that it doesn't have a forward button.