After testing multiple recipes from this guide, I can confidently say it's a solid starting point for bath salt newbies. The lavender-rosemary blend left my skin baby-soft, though my white tub looked like a hippie festival aftermath.

Pro tip: The peppermint-eucalyptus combo works wonders for sinus relief during cold season - just be prepared for your bathroom to smell like a cough drop factory for hours. Storage tips were lifesavers; my first batch clumped into cement-like chunks before I learned the silica packet trick.

Warning to apartment dwellers: The 'luxury flower petal' recipe clogged my drain after three uses (cue $90 plumber visit). Stick to simpler mixes unless you enjoy playing 'guess that herb' during your next shower backup.

While critics claim you can find this info online, having tested both, I appreciate the book's curated troubleshooting section - especially when my citrus oils separated like a bad salad dressing. That said, the Epsom salt dominance does feel limiting for those seeking alternatives.

Final verdict? Perfect for gift-making (my mother-in-law still raves about the vanilla-chamomile blend) but manage expectations - this isn't groundbreaking chemistry, just convenient compilation with some messy realities they don't show on Pinterest.