A couple of notes about the service that might answer a few questions (I have been using it for about 3 weeks).
1) If you already have a USPS account and your account is frozen then you will NOT have to go to the PO to get verified. If you *don't* have an account and your credit is frozen, expect a trip to the PO and expect to get the service you would expect.
2) Once you are signed up, it will take a few days to get your first email notification. It took me 3 days, but now I get them daily. The time the email is sent is not consistent. Sometimes it's early, sometimes it's after the day's delivery has been made. But if I have gotten First Class mail, there has been an email.
3) Using the service for 3 weeks, there has yet to be a piece of "important mail" that wasn't scanned. If it's not a normal sized envelope, it will NOT be included in the email. I have had 3 pieces of "normal sized" mail that wasn't first class and wasn't included in the email.
4) The email has a link to report any mail that didn't arrive that is supposed to. I have not had this happen, so I am not sure what the email would do.
So, all in all, I am pretty happy with this, especially considering it is from the USPS which we all know has "sketchy" customer service, at best. I especially appreciate that there is no additional cost for the service so that adds a good bit of value for me.
After a couple more weeks of "beta testing" I will probably adjust my mail-getting routine. We rarely get anything worth a damn, so I would probably only check it every 3 or 4 days. Or on trash day when I can walk it from the mailbox directly to the recycle bin.