Rated 5 out of 5 stars

Secure and easy to use. Switched from KeePass to Lastpass.The Security Now! podcasts convinced me about the security:http://www.grc.com/securitynow.htm
Podcast #256 for Lastpass
Podcast #143 for the Yubikey: Lastpass supports 2-factor authentication.

This review is for a previous version of the add-on (1.69.1).