(sorry for the off topic in the WYST section)
Indeed, it's not that bad but you always have to be careful, it can be tricky especially at ~18mm, try not to use it at f3.5 and so on.
Anyway I'm still thinking about a replacement for mine and it's between the 17-85 and 17-40 L which both have advantages and drawbacks IMO, depends on what you need ... I guess I won't really sleep at night until I make a decision but I like the 17-40 more and more ...
A 17-55 wouldn't be bad either, but as Dingo probably noticed, it's too expensive :/
Edit : thanks for correcting, Martjin, wanted to say wide angle, not wide open
Sometimes hard to get sharp shots at 18mm