If you want your knifes to actually be sharp, avoid Sur La Tables knife "sharpening". First off, it's over priced. They charge by the inch. Secondly, and most importantly, they don't get them sharp. What is the point if they aren't going to sharpen them. Sure, you'll leave with fancy little bag and your knifes in branded cardboard sheaths, but they won't be any better then when you brought them in.
I wasted my money on this service earlier this year but they wouldn't give me a refund over the phone and living in Lincoln Square I hadn't had the occasion to stop back by the Lincoln Park store for a refund. Thanks guys.
The good part of this is that I too the advice and drove down to Northwest Cutlery on Lake street. It's in warehouse section underneath the green/pink line tracks. They know what they're doing! They use large spinning stone sharpeners and it's 3.50 per knife, no matter the length. My knifes have never been so sharp and I'm loving cooking those pesky green onions again.