I made the switch to carbons 2 yrs ago, and I'll never go back to aluminums. Why, simple I shoot as many 3D courses as I can in the summer. I simply got sick & tired of replacing bent & broken alums. It was costing me $. Plus the modern carbons which comes with inserts, rotating nocks, and comparable prices to alums made the choice easier. It does help to know a little about arrows, and I can tell you not every single carbon in a dozen will be perfectly straight. I always get 1 or 2 in a dozen that won't spin perfectly. The remaining 10 still outlast a full doz of alums if you shoot alot. One other nice advantage I did notice the very first time I tried carbons. They are real quiet across the rest. Even with shrink tubing on my rest, I still could hear some noise from an alum when drawing. I also have no problems with penetration, and I dropped 25grns on my heads when made the switch!