Kai Lord said:
Okay I'll respond to this one but my eyes are getting tired dude, we need to wrap this up.
If it was called Ehlonna's Self-firing Longbow or basically behaved as one, no I wouldn't use it. In case you haven't realized, I'm not a fan of competence bonuses for weapons.
Enhancement bonuses I can picture as adding to the attack roll because they better penetrate armor or shoot faster and are harder to dodge. Proper aiming is still up to you.
Except you're making a mistake here -- a competence bonus (especially a mere +2) doesn't mean the bow is aiming itself ... after all, picture a Fighter(20), with a Dexterity of 24, using that bow.
She has +20 BAB, and +7 more from Dexterity. Weapon Focus is +1 more, and Point Blank Shot is +1 more (and +1 damage).
That means, before selecting a weapon, she has +29 to hit.
+2 more to 31 -- and you're saying the BOW (or, the bracers) do more of the aiming than the archer? because of 2 points, out of 31?
Perhaps, after all, the Bracers of Archery's competence bonus is because the archer is given some extra cue (visual, subconscious, whatever) that helps compenate for range, windage, target movement, or whatever -- rather like a nice, top-of-the-line, modern sighting system.
OR maybe the bracers just helps the archer hold her arms steadier, quelling micro-tremors without the archer needing to focus on them.
Or perhaps they simply run a near-subconscious litany of some sort through the archer's mind, calming and focussing her on the task at hand -- sinking an arrow into her chosen target.
...
In other words, there are a LOT more ways for a competence bonus for a weapon to work, OTHER than "it aims itself".