This has been my "go-to" lens for many years. But on vacation this summer it let me down. It's not the typical error - most of these have issues with the auto-focus. That works perfectly. I believe the image stabilization works fine too. But the lens stopped communicating with my Canon 60D camera body (Err 01 communications between the camera and lens is faulty." See photos.) Here's the thing: sometimes it works, sometimes it doesn't. So if someone knows how to fix this, or use the parts to fix a different lens, it may still have value. Note: camera body shown in photo is not included - it's just there to show the error message.