Don't get me wrong...I think this atty is great. Tons of flavor, simple to build, and it holds a ton of juice. The threads on the top cap are a little rough, but they still work fine. Its not as if the top cap is hard to take off or reinstall...just a bit rough.
When I got this, the oring on 1 deck was already split, before I did anything with it...other than remove the deck. So, I used the one spare that they provided. After hearing of other's troubles I decided it'd be nice to have half dozen spares, just in case.