I bought my Look from Wrench Science. I went into the store however and had them measure me and get the right size frame, stem, cranks, setup my seatpost ht. etc. After they built the bike I came in for a final fitting and it was damn near perfect.

In the store they have a slick spreadsheet that calculates everything out. Similar to online, but a little more in depth.

I measured myself at home using their online fit and came up wth a 56cm frame, in the store they got me with a 57cm frame. So pretty close from the online fitting. I could easily have gotten a 56cm frame as well.

any more questions on wrench science let me know. You should SEE all the frames they have in stock.

Jim Bonnet