A roaring success
Definition 1 of 1
Pro Tip 1/3Positive Energy
The phrase often implies excitement and a highly positive atmosphere surrounding the success. 
Their wedding reception was a roaring success with guests dancing all night long.
Pro Tip 2/3Beyond Expectations
Use it when an outcome is much better than anyone thought it would be, not just slightly better. 
His debut novel was a roaring success, topping bestseller lists.
Pro Tip 3/3Public Events
It's particularly suited for describing the success of public, social, or community events. 
The annual street parade was a roaring success, with record attendance this year.