I don't think it has been out that long and didn't fill an obvious gaping hole in the Olympus/Panasonic lens range. I do like it though. I bought it for Costa Rica for which it worked well. I didn't know how much I would use it after that, but I am finding it quite useful for wildlife which doesn't like you getting too close. I have also recently picked up the overpriced teleconverter for less than half price. I am not yet as convinced by the teleconverter as I am with the bare lens, but it is early days. The teleconverter photos lack "punch" - maybe lacking contrast rather than resolution.It's quite an expensive lens, and I get the feeling most people already have the range covered by other lenses.