This place is reasonably good for reviews:
http://www.dpreview.com/lensreviews/...p5-6p3_vc_n15/
My preferred site, Photozone.de, don't list this lens.
I haven't tried this lens, so take what I say as an untested opinion.
I think with any lens that gives this zoom range, you are not going to get
very good results, with emphasis on the very. Maybe take your camera and card along to the shop and ask to shoot some images that cover the range, both zoom and aperture and then have a quiet look at home without the salesman breathing enthusiasm down the back of your neck. If they say "No", I'd take my $$$ elsewhere. Those are my thoughts anyway.