I've been watching this topic and yesterday evening we tried 90 degrees out of phase cranks. It was fantastic! Seemed like we were much smoother. The spin was easier with my wife's stroke pushing my pedals through the top. She typically doesn't stand to crank, athough I do--standing seemed to work out just fine as well, she remained seated and I stood when needed. Thanks for the advice posted here, we are going to stick with the 90 degrees out for a while, maybe permanently.