For the money, you can't beat the versatility. If you get your hands on a good copy, you'll be thoroughly impressed! There isn't another lens around that can give you both wide aperture telephoto AND zoom versatility (ok, maybe the 200-500 f/2.8, but let's be reasonable. It'll be a cold day you know where before someone posts images from that lens here).
Really like what I see here. Did you use your 5D Mark II body for these pictures?
>> Considering the 120-300OS for my fullframe, but still think it costs some serious dosh... might go for a non-OS variant for about half the money if it performs equally