This is the holy grail of crafting in Guild Wars 2. At first it will appear confusing and overwhelming, but within hours you will transform from crafting noob to elite pro. Get ready to turn previously useless crafting skills into personal ATM's.
My secret to using this site is the ability to find items you can craft and then sell to buy orders for a profit. That's right, you will instantly make money selling to buy orders instead of waiting for sell listings to complete. The only time you'll be waiting is if you use buy orders to acquire your crafting materials. In almost all cases you must do this, but once in a while you can just buy things out, craft, and sell to the buy orders for insanely fast profits.
Right now we're dealing with the festival of the four winds, so not all crafting methods are going to work well. This is due to the increased price of crafting materials. There are plenty of opportunities though and this website is updated frequently from the game's servers. It does not sink with gw2spidy and uses its own algorithm.