From the very first you feel you have gotten a high quality product in your hands. During usage this impression is just confirmed. With this lens you feel you can handle almost every photographic situation..
I am very glad I got this 2.8 IS ver.. It is expensive, yes, but I donīt have to buy another lens to support this lens cos it is a very versatile lens covering a high number of photographic categories.
The more i use it the more i love it. The moment I press the shutter release button, i know I am going to get sharp pics.. every time...really an amazing lens! IS is fantastic, more useful than expected.
Before buying this lens I had been reading a lot about weight concerns from some users, and I had expected this might be a minor problem - but now afterwards I really donīt understand this. No problems at all. I am carying the lens in my Lowepro Toploader 75AW, when I am not shooting.This bag and the 2.8 IS is a good combo, cos the bag gives me quick access to the camera. I can carry this lens all day without any problem.
I really canīt find any CONS so far - only the price maybe, but it is worth it.!!