As someone who uses LastPass, don't do this. It (usually?) won't let LastPass log you in to the site nor save the log-in details for a new site - a huge pain in the ass.
On another note, if I fail to enter the right details or check the right boxes, don't let me start all over again! Opera is great in how it lets you go back and retain all entered data, but other browsers are not as good at this.
As someone who uses LastPass, don't do this. It (usually?) won't let LastPass log you in to the site nor save the log-in details for a new site - a huge pain in the ass.
On another note, if I fail to enter the right details or check the right boxes, don't let me start all over again! Opera is great in how it lets you go back and retain all entered data, but other browsers are not as good at this.