I had a good experience with them as well recently. I needed some large special order OEM parts where shipping would of killed me. They not only got the parts in 4 days, they matched/beat the popular online parts dealers prices, plus no shipping charges.
They do offer a NASIOC discount, best bet to get it is to contact Michael Ehle (M.Ehle on here) or Scott Clouse (service manager). Otherwise, identify yourself as NASIOC family to the parts manager Chuck Day you should get a discount.
Thanks again Michael!