According to Jason Perlow, some routers of Cisco have certain issues. The models mentioned were WRT-610N, E3000, E2000, and E1000. According to the article, those models were experiencing reliability issues and sometimes knocks out your Internet access. The devices get so hot to a point were you would think it’s overheating.
Good news is that Cisco Engineers are actively looking to fix the issues and make the users “happy” and “confident” about Cisco Linksys producs. You can read his entire article at http://www.zdnet.com/blog/perlow/cisco-linksys-the-makeover/16665