I just went through and made wills for myself and my spouse. Excellent interface and indeed, it took about 10 minutes which just kills (no pun intended) what I was about to go through with a lawyer.
Only point of feedback - you say you're going to email the people we appoint as guardians etc. with their responsibilities. Would be good to know what they're going to be sent, when, and be given the option to add a message to what they're being sent. Might also be nice to even be copied on that message. These are obviously sensitive conversations so seeing exactly what someone is going to be getting from you seems important.
I live in Illinois and you guys don't support living wills there yet - do you have any sense of timetable for the states you aren't supporting yet?