After many years of Rails (and other frameworks), I know now that I NEED to review the code of plugins written by folks smarter than you or I. I don't count the times I had to remove plugins from my application.
I use Warden and saw there was a rememberable strategy in Devise that I could use.
I also read I can secure the cookies to be only send over SSL. I was hoping some further explanations on that since Devise doesn't seem to do it.