I tried to get away with the 16-35 as my everyday walk-a-round but it just can't get in tight when you need it. So I bought the 24-70 and it is on my 5DmkII 75% of the time. In fact my 16-35 is my least used lens now (70-200 2nd most used). I love it and wouldn't part with it but with the 24-70 being so versatile and ridiculously sharp it is the work hors and I now definitely endorse the 24-70 over the 24-105.