Currently, this lens is in short supply in the UK. I needed this to go with a NEX-5 to take pictures during swimming galas, where distance and lighting are not the best, and to match the zoom on a Lumix TZ7.
I decided to use this as my main lens for the camera, since it can replace the 18-55 lens that is commonly fitted, at the cost of size and weight. It must weigh around half a kilo on its own, requiring support under the lens while shooting, and attracting a fair bit of attention, especially when the lens hood is fitted (included in the box).
The E-mount lens allows auto focus with the NEX series of cameras, focusing quickly in good light, and taking 1-2 seconds in poor conditions; and was ideal for an incompetent novice like myself (other lenses fitted using the adapter mount focus slower, according to feedback on the net, using the latest camera firmware).
The zoom action feels solid, the focus ring behind, with a zoom lock facility to stop it creeping and more usefully for me, to stop the lens extending when the camera is slung over my shoulder.
Quality-wise, the pictures are as good as expected from the NEX 5, distortion is apparent at the 2 extremes of zoom range according to reviews on the net, but isn't noticeable for me as a casual user.
Packaging-wise, there's only a plastic lens hood, lens cover and paper instructions in the box. No case provided or snout to fit over the lens when attached to the body, and no flash extender, which is needed as the lens barrel is taller than the camera body - this is quite poor considering the lens is almost twice the cost of the basic camera.
With the relatively high cost of outlay, I'd hope to be able to fit this lens to future E-mount cameras. Other than the exclusion of the flash extender and lack of a case to protect the lens, no real gripes from me.
Addendum: Using the lens at the Aquatic Centre in Stratford, London from the tiered seating allowed reasonable shots to be taken - the lighting at the event is far superior to the dim lights at other venues, Ponds Forge in Sheffield being an example of awkward lighting. From full zoom pictures of the winners on the podium, to using the continuous shooting mode to capture 4-5 frames from a starting block to hitting the water to the odd action shot resulted in many usable photos.