Stabilizers are generally accepted to serve two basic functions. Originally they were utilized to help with balance and aiming. In that regard I find that either having the bow remain level or having it tilt very slightly forward to be the best balance for my shooting. This is checked simply by holding the bow out in front of you with an open grip.

The second function of the stabilizer, and the one most commonly quoted in advertisements, is their ability to reduce noise and vibration within the bow. Many different designs are currently on the market but two always seem to stand heads and tails above the others...any of the Sims combinations and the Stealth stabilizers.

Hope this helps.