DD-WRT also gets rid of alot of problems that come with shoddy WYSIWYG firmware.

one of the most major problems that my girlfriend runs into is having to power-cycle the router because both her and her brother use modified versions of firefox that have make many connections for the standard firmware in the linksys routers to understand.

basically the linksys routers keep stuff open for a few days on certain types of connections, resulting in an overflow if it gets pushed past it's limits. currently their BEFW11S4 needs to be powercycled about twice a week when she's home and on the computer. i am told other firmwares including DD-WRT get rid of this problem completely.