Update:

Warning! Completely UNRELIABLE.

It generated a new password for my email account, and then didn't save it, stranding me without any record of the new password. I almost lost a google account.

You might think that this was a one time thing, but I can assure you that this happens constantly with lastpass. They're simply not smart enough to realize they need to confirm that the password they suggest has actually been SAVED before passing it on to the website. Do you really want such a developer to generate your passwords for you?

The fact that lastpass themselves are incapable of understanding even the most simple feedback (see original review below) means that it would also be pointless to explain to them that "no, the generated password did not create a new history entry in the generator popover" and expect them to fix anything. They've demonstrated that they're not capable of grasping these kinds of concepts, based on previous feedback of similar kind.

In their heads "everything works" as long as it works on their machines. A telltale sign of the kind of developer you don't want in charge of your most important data.

---- original review: ----

A broken extension by people who are incapable of listening to feedback. Not a good combination.

Let's just say the extension is completely unusable, with broken UI blocking all use, and that Lastpass themselves show no interest in the problem.

One star is about right.