The Area 419 brake has a tendency to carbon lock up. My brake currently has the collar/nut seized to the brake portion, which I'm speculating it's due to carbon. This was happened to some of my shooting friends as well (that have since gone on to other brakes - most to the Heathen).
Another downside is the "gills" of the brake are super sharp - I cut my hand up good trying to unseize my brake. Honestly, for a product at that price point, I would expect a more refined product.
I find the recoil reduction of the Heathen to be just as good, and the brake design is a bit more refined. It has never seized up on me, and it has always been easy to remove. The new design with the changeable inserts look awesome, I have a couple of the new style coming in soon.