I had this lens for almost a month. It works really well with my Olympus E-P1. The image is very sharp between 18mm to 70mm and a bit soft from 70mm and up. I like the built in O.I.S on the lens, so I can turn off the IBIS on the camera to avoid excessive heat when using it continuously. This is an amazing all around travel lens when pair with my Panasonic 20mm f1.7 lens, which I can use it indoor such as restaurant with limit light condition and 14-140mm outdoor for landscape, wildlife animal or any occasion. I bought it separate with my camera system due to I like the retro look of E-P1. Consider its price is a bit high, but if you like to shot with video, then this lens is definite worth it Due to its virtually silence video focusing ability. I hate to hear my 20mm lens roaring when recording video using C-AF. I also planning test it out in my friend's coming wedding event and pair it with Olympus FL-50 flash. The lens is high quality made, inside of lens is made by metal with plastic casing I think due to manufacture consider its portability of m3/4 system. Consider its wide to telephoto range & price, there isn't much lens performs better than this lens unless you are willing to pay $500 more for the Leca 14-150mm without silent focusing ability.