In the past year or so it's become harder to get discount coupons there, but it's still consistently the best place. When I want to buy shoes I google all around and find the best price. Gotten shoes from a lot of places - Amazon, 6pm, shoestores.com, shoes.com, Dicks, leftlane, others... but RW comes through more frequently than any other individual site.
I've returned things a few times and it went great.
Used roadrunnersports a lot in the early to mid 90s*, but haven't bought anything from there in at least 15 years. They are never the best price. Maybe RW will end up like roadrunner where they apparently make a living without having the best prices, but for now RW is still the top site for shoes.
*was on a roadrunner email list in the mid-90s and near Halloween they sent out a 31% discount code exclusively to their email list. They apparently didn't know how the internet works because the code was immediately shared on every running message board and everybody cleaned up. That was the end of special big discount codes by email.