I work in a store that has a very liberal return policy - I think that is the best part of getting a good fit. When I sell a bike (in particular a road bike or a mountain bike that is going to used as such), I really try to get the fit as close as possible in the static position. A test ride will sort allow the customer to find one that should work well.Then I explain the adjustments one can make while riding. But I always let the buyer know that they really need to get a couple hundred miles on the bike before they can know if it is the right one - they need to get it dialed in for their body and stle of riding. Thus, the liberal return policy for those who can'tget the bike to work.