True, on the surface, Yahoo has a good solution. However, they do not allow for much flexibility and the system can be difficult to work with if you have a complicated product line with lots of sizes, colors, options, etc. We tried like crazy to make it work, but had to abandon Yahoo for other solutions that allowed us more control (Perl, MySQL, etc.) Again, if your product line is kept simple, Yahoo solves lots of expensive problems with a minimum of hassle. My 2 cents.