Con: You can't retype it, which means you will have to copy and paste. If you have your password management program on your system, not really a problem. But if you end up on a system where you don't, just retyping the thing will be very difficult.
And then after you try a couple of times you get locked out ....
Life could get very annoying.
Even if you write it down, a good password is something you can type consistently without errors.
