I also love this lens and have been using my copy for years with no problems.
I shoot with this lens and a 70-200mm f/4L IS lens on a pair of 7D cameras and love the combination. I usually average out to about 2/3 of my images shot with the 17-55mm and 1/3 with the 70-200L...
When I first read about the IS capability of this lens, I thought that IS capability was unnecessary on a lens of this focal length but, I soon changed my opinion. The combination of constant f/2.8 aperture and IS makes this my go-to medium focal length lens. It is a great low light lens as well as a super general purpose lens...