Review (3/5): I've used better.
While I can appreciate the convenience of a heating cap (versus a hooded dryer), this does not get as hot as I would've hoped, even after pre-heating for two minutes as the manufacturer suggests. The fit is not as snug as advertised, particularly in the back, which means you cannot feel the heat around the entirety of your head. In addition, the chin straps are uncomfortable and do not provide the tightness and security in an easy-to-tie format as I expected.