We have one, and have taken more than 15,000 pictures with it.
It works and looks like new it is brand new out of the box. Others say this lens creeps badly, and while I don't doubt their words, ours doesn't.
At the $749 we paid for it, that works out to be about 5 cents per picture... and counting.
Is it as well made as a 70-200 2.8 VR? Is it as fast?
No. It is a consumer grade lens.
I think it takes pretty good pictures. If after years of use it falls apart, I will simply throw it away and buy another one.
If I go home for lunch, I can find out exactly how many pictures it has taken (we can track this since it was placed on a D80 when the camera was brand new, and which has never had another lens on it... both were bought at the same time).