the weight can become bothersome especially if carrying it around all day long. even if i'm carrying just my 5d2, 24-70, and 70-200 f4 in my bag, i feel the weight and it can get uncomfortable. but what else is there that can replace it? nothing. the 24-70 is prob the most useful lens to me on the 5d2. that combined with a crop + 70-200 is ready for anything.