This is fun 3

Positive
1. Relatively compact and lightweight.
2. Good level of craftsmanship and haptic connection fits like a glove and zooming goes well out of hand. In conjunction with the G6, it is good to handle.
3. The stabilizer serves well and works fast. Even freehand good shots are possible at telephoto, but what is also to point 2 ;-)
4. imaging performance is good to very good.
5. Geli and transport bag are included

Neutral
1. The focus of course could be partly better, but that's to complain about high levels.

Have uploaded some pictures. (Woodpecker, Hawfinch and moon)

When you consider that one here 600mm has available and relatively compact is underway, the price is okay. Comparing other lenses / cameras, you are very well positioned.
Did the Canon EOS 700D with 70 - 300mm also can test. Since they priced in a league play (both the camera and lens) I bring to the time comparison.
I could not achieve better results, even if the recording chip of the 700D is greater. The focal length does not quite to 600mm zoom (here it is only 480mm) This, however, is no longer critical.

For me, the acquisition was worth, and am very satisfied!