I used the 4G in my Donnay 94, I strung it as a full bed @46. I really liked the control and depth I was able to get, though it lacked spin in a major way.
I hit for about 6 hours (spread out over 3 days) and I found that around 5 hours the string got weird. Under powered and started feeling a little tenderness in the elbow.
Honestly, I would probably never use it again.
Bullfan, "Bull rap, there is video evidence." and "Dude it's on the Internet, and hasn't been hidden."