Our club in Wisconsin just got the Steams in. One of my fellow co-works already has one and I heard him pop a string today. He told me it was about 5 hrs of play on the 4Gs. I told him he is going to need 13G string, ha ha.
On a serious note I think these racquets will sell like hot cakes, which is great as I endorse the company!
USPTA P2, Wilson