I did a quick search that didn't turn up what I was looking for, specifically. If there is already a thread on this discussion, I would appreciate someone linking me to it.

The LBS is on a test program for the Qrings. They are doing a intro price to "rent" the rings, and the customer is asked to test them for 300 miles. After this you either give them back, or the purchase price is reduced by the up front fee. Lots of the club guys are being sold on it and are convinced it works.

My immediate thought was, oh look, it's Biopace again. I was shown that it most definately is not Biopace. One of the most significant differences you can tell right away is that it doesn't change the chainline length. The RD does not move while you pedal. This brings up an immediate question as to the actual effect of the rings themselves, and would like to have y'all explain to me how I am wrong (or not).

In my thought about it, I considered that if the chainline isn't changing, as reflected by the lack of RD movement. If the chainline isn't moving, then isn't the gear ratio really just staying the same? In other words, they have this nifty looking oval ring, but it is still taking up the same amount of chain length, regardless of what part of the ring you are on.

I can recall from owning Biopace years ago that you could feel a surge in the pedal stroke. You could actually feel the back tire go faster, then slower, as you went around the crank stroke. When I test rode the Q ring bike I could not feel that surge. It was smooth all the way around.

Considering that with a chainwheel, you are being effected by the entire length of the cog and its interface with the chain, not just one part or side of it (like a wheel where the contact surface is only the bottom) I really don't feel like these rings are doing anything aside from placebo effect which is quite powerful on it's own.
I invite you to prove me wrong, or explain it in such a way as to make me understand WHY it's working the way they say, without changing the chainline.