I think that I have only ever seen 2 SG bats. One a couple of weeks ago, which sounded like a plank, although I found out it was actually cracking at the splice area. The other was one some guy in our University team bought for £300 from India. He said it was the best bat money could buy, and I was pretty skeptical. That is, until I saw him hit a fifty off 12 balls... =.= To be fair, it was 6s, but the boundaries were pretty big, and he hit a few MASSIVE sixes. He is a big hitter though, and I'm sure he could do similar with bats not quite nearly as good.
It was still quite something to watch!