They definitely have the best organized website of any parts seller. I've found their prices are frequently much less than the local chain stores on certain items, especially for antique vehicles. Sometimes the shipping is a break even proposition, sometimes it still ends up costing less.
It's a great first stop for checking availability and prices. I always compare their prices with others, though because sometimes its cheaper to buy locally or even from one of the restoration houses.
Be sure and enter the discount code in the space where it says "How did you hear about us?"