I just wanted to share how satisfied I am with Sigma service. My Sigma EX 18-50 f/2.8 Macro broke about 2 weeks ago - zoom ring started making grinding noises and got stuck. I called and found out that EX line of Sigma has 4 years warranty, so I went online, filled in order form and sent the lens off prepared to wait for long time. Well, to my surprise, in 2 days after the lens arrived to their receiving dock, it was repaired and shipped back to me! I got it back in total of 12 days, the order progress is traceable online with all the tech's comments and description of repairs. Lens was cleaned and very nicely packed and arrived safely to my door yesterday I tested it and it works like new. Huge thumbs up to Sigma service department!