google this lens reviews. you will find it is an excellent lens. Many reviews rate this lens as one of the best none-L zoom lens. It is a great travel lens. Light, sharp and fast. I liked this lens, but I had too much money to burn, so I went straight to L lenses.
Personally, I think EF-S is here to stay. EF will be phased out just like medium format. Then again, I don't know for sure. It is just a personal opinion.
Then, again, it would not be sold under $1000 anymore. Canon will sell it for over $4000. just think about the 35-70 2.8L. you know what I was talking about, right?