I really love this glass. If it were not for the need to sometimes shoot in dark rooms, I would use it almost all the time. A little soapy at 300mm, but not always and not critical. Autofocus is not the fastest, although I got the hang of shooting even sports. Lightweight, comfortable, sharp enough - in general, for such money, there are only advantages. Of the analogues, there are 55-200, the 55-300 has a better picture at times.