[trod1234]

I don't know about their business suite.

I've used their calendar and email. The calendar has had issues over the past few months where it would revert unexpectedly and silently back to a previous date (like they reverted to backup but no notification), with all changes and appointments changed after that date being lost.

Some of the email features are very dependent on browser features where you can't set them manually for example timezones impact all visible dates among both apps, and are derived from the metadata of the client which don't update to the current date/time but to last visited time.

If you happen to be traveling, this can cause missed appointments/confusion when you do the mental gymnastics from your original timezone.

Personally, I don't think its ready for production requirements of business.