After some advice from the forum I got this lens, as my new low light indoor zoom.
I finally had chance to use it today. A quite day, with the kids and the sister in-laws kids (the first two shots). The first one is cropped quite a bit, the other ones are nearly straight from camera, except for exposure compensation...
Normally I would have used the 50mm 1.4 for this - but the freedom of the zoom was nice, and while I missed the bit of extra light, I guess you can't have it all. The last shot would have been impossible with a 50mm, and if I had stopped to switch lens, he would have been long gone.
I think I like this lens. I would have liked a bit shallower DOF, but the bokeh is okay, and it's nice not to have to worry about having a to shallow DOF. I didn't miss the extra reach of my sigma 17-70 at any time.