I just tried my first ever conditioner only wash, and wow - the results are clear after only one wash!  It's smoothed out a lot of my waves, which is a downside, but they'll probably bounce back soon.  Still, my hair is even softer than normal, smells great, and just looks healthier than with a normal shampoo and conditioner wash.

Here's a before and after pic:

Thanks, Bikerbraid!  It really does make a difference.  I'll be doing that more often now - maybe twice a week.

Thanks, Amanda!  And you're welcome!

Thanks, Yaku!