dont know much about this lens, but one hing for sure is that it got alot of zoom, the highest zoom factor lens thru out all lens maker.
My personal though abt this lens:
at its max focal length 270mm, its F stop quite small at 6.3, will make shooting at its tele end difficult in indoor situation, even with VC also not much help if you are shooting a live subject(ie human or animal) your shutter speed will be very slow and u have subject blur easily. personally unless my camera got very good high ISO performance i wouldnt pick up this lens.
secondly, high zoom factor lens usually suffer at either end of its focal length either the wide or tele end, usually wide, the IQ sharpness, distortion control is not that good.
But then again if i am not so concern abt IQ, as a casual snapper this lens is a very good choice for day use, walk around and shooting scenery to people.
Thanks alot nixontkl.
Do u consider 450d iso performance high enough for the len???