Not that concerned over actual accuracy as I am about everyone how is posting numbers use the same method.
the problem is, that many ppl use other parsers, because it is not accurate. while in reality it is accurate enough for most of the forum talk, this causes some issues. but as most ppl use the hilbert plugin with act, it is a good base of comparison, though it does not hurt to know the other parsers either (the enemy )
This is the new kid on the block, it's very similar to the Aria/Hilbert plugin, and really just adds a few new features to the same thing, with its BaseDamage and Damage columns and a new sorting system. The former feature makes it my personal favorite.