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@yoav
As a doctor, I am frequently bombarded with new products that in theory are better than the old ones, and the sales reps will give me lots of reasons why their product should be better but I won't beleive any of it until they show some real world evidence that there is a benefit.
Similarly with these rings, irrespective of what the theory, the anecdote, the wind tunnel or the power meter says, I want to see some real world data, comparing to traditional rings in a scientific way before I believe any of it.