Generally I don't like aluminum because of the consistency issue. They tend to start slipping when they get damp and early morning temps. can cause that same problem. This seems to be especially true with the anodized and the stoned. You can mitigate that somewhat by wetting the tip of your striker and chalking it.
All of that said, I do like a Jimmy Schaffer blasted aluminum over aluminum (black surface) using the chalked striker. Haven't had any issues with that call.
The other thing with aluminum is, they need to be cleaned regularly with 91% alcohol (87% has oil in it and encourages slipping).
I do love the sound of a good one and turkeys respond well to them.
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