Great lens--it lives up to the Canon "L" lens hype. .The image stabilization feature on the 24-105 allows you to shoot photos at a slower shutter speed in dark situations since the fastest this lens goes is F4. The IS feature  is really amazing and incredibly useful for shooting video. Adobe Lightroom helps fix some of the distortion on the wide end. The extras included in this package are okay but should not be the deciding factor in getting the lens. The bonus Digital Ultraviolet HD UV filter I received seemed really low-quality in terms of construction as I was never able to mount it on the lens since I was afraid to damage the threads on the lens.