Yeah, I have a 70-200IS-L f2.8 here as well.

It does get carried along on some trips still, but the 70-300DO has supplanted it for overseas travel now.

The image quality of the 70-300 is not even close to that of the 70-200. I would not choose the 70-300 for portraits (the 70-200 wins big time there), but it is still very good for our travel photography.

Cheers