This the 'one' lens to do it all. Multi-element wide-angle to telephoto zoom. It's like having all the range covered.
Price? Well, my eyeballs popped off its sockets when I saw it. RM2.8k. It's even more expensive than an entry-level kit that covers the camera body and lens.
Performance? Well, http://www.dpreview.com/ gave it a 7 out of 10 rating. From my experience, it is convenient to pack only one lens and a body when you travel.
But the multiple element factor and usage in rugged environment may be a hinderance.
Usually, such a high magnification lens with all the different elements would not take a drop or hard bump.
You may screw up its focusing and zoom barrel. But then again, given the price and its capability, its a toss between carrying an extra lens and the additional weight in your already heavy and