I won't be so bold as to claim I will NEVER buy one - after all, I once claimed I would never buy a Busse because they were too expensive (<img src="/ubbthreads/images/graemlins/doh.gif" alt="" />)...

BUT, the corrugated blades do nothing for me either, and I'm not sure I buy the "less resistance" claim without some careful controlled testing. There are too many variables at work for this physicist to just accept the claim without rigorous experimentation. I also hate the way they look, so it's unlikely I'll get anything corrugated, unless there's some other design element that absolutely convinces me.