So far so good for us. No reported issues. We've been running it since July 8.

I'm using it from July 8, no (new...) issue to report

Running since yesterday. No issues have been reported till now.

Hey Christian, 

What issues did your users report?

Looking forward to hearing from you. 

Kind Regards, 

Hi Zach,

We have no issues so far with the latest public build (8223).

We're monitoring continued complaints about All Day appointments made in Webmail and sent to Outlook MAPI users. They're not showing properly as an all day event. We're collecting more information and we'll open a ticket.

We have been running for a week, it is stable. But new all-day calendar bugs have come up, also deleting recurring calendar issue with MAPI.

I have found a BIG issue with data loss in the new 8223 release: if you move a message between 2 account configured in MAPi on the same Outlook (whether you use 2 full MAPI accounts or use a single account linked to a shared folder of a second account), many (not all, it's by chance ...) of the mail messages will disappear after a short time and it will be impossible to recover them because they also disappear from the server...

More details here: 
https://portal.smartertools.com/community/a94906/sm-8223-big-data-loss-problem-outlook-mapi-moving-message-from-one-mapi-account-to.aspx

NOTE: I have a ticket opened with SmarterTools...