Does Rotor Q-rings work better than circular rings?

[musher]

Hi, i am looking at buying a set of Q-chainrings ,has any one used them ,how did you like them ,did you notice a reduction of the " dead Spot" , a improuvement in "Power"?.
I have found a "Preliminary report on Q-rings:www.rotorusa.com/pdf/q-ringstest.pdf .Thank's