Pros:Durable, Rugged, Fast focus, Fast autofocus, Sharp Focus, Weather proofed, Easily Interchangeable, Strong Construction, Easy To Clean, LightweightCons:None so farBest Uses:Close-up photography, Wide angle, General Use, Sports/Action, Upgrade, Portraits, Landscape photographyI replaced the 14-45 kit lens from my E500 which I have been using on my E3 and is a good lens. But WOW, this lens is super!At this price cannot be beat. Best feature to me is the manual focus mechanism s "direct" compared to the "wire focus" on kit lenses. Next, it focuses so much more quickly and precisely in automatic focus mode.The distance scale on the lens barrel is a big plus also. I enjoy close-up work and this lens focuses to within under 9"!Being weatherproof makes it fully compatible with the E-3.It also does a super job of controlling lens flare.