I have some clothes that I send to the dry cleaner. This is mostly because I know I can't press them properly or make them look decent after cleaning. Things like suit jackets. I regularly wash and iron silk shirts with no ill effect. I wash cashmere, I wash merino wool, I wash linen.
Still, I'm a little hesistant when I have a garment whose fabric content isn't quite as familiar as 100% silk or 100% wool. Who knows how blends or fabrics like modal will respond to be tossed about in the washing machine? I've normally followed that prevailing wisdom and sent anything with the dry clean only tag to the cleaners. Being the rebel that I am, I decided to try home laundering just to see the result. The experiment involved this dress: