Please! I struggle to find shoes that fit me since I find that trying them on in the store has basically no bearing with how they'll perform on the street. Yet the shoes I end up with don't exist in a year or two when I want to replace them.
If I know these shoes are "perfect" I will simply buy two pairs. If I'm unsure I'll go back a week later for a second pair.
It doesn't stop me from needing to buy new shoes, but it does postpone the process a little!