I have had my SMO66 for about 6 months. NO comparison to a BGE which I have also owned for over 20 years.
The 66 produces so much better flavor and is so much handier to use. You will absolutely be blown away.
as for bark and flavor? You will be especially delighted from your first cook. the program to set and hold will take the worry out of your time schedule and worries about getting home in time to pull your product.
Do pay attention your first few cooks on how much wood to use. In fact if you have a kitchen scale weigh it. It will get bitter easily if you make the mistake I made and get too carried away.
As for flavor? My husband insists it is better by far than any BBQ joint in Kansas City and that is a bold statement.