Not at $34 a pop
I've got a bad back and regularly do Epsom salt soaks in very warm to hot water.  I usually pay about $5 for a bag of Epsom salt that's good for 4-5 baths.  That's about $1 per soak.  The Pursoma Digital Detox Bath Soak did about as much to relax me and relief pain as the Epsom salt and with the Epsom salt I don't have to shower to remove the "mud" and rinse out the mud/dirt from the tub after using it.  I suspect more of the relaxation comes from the hot water and length of time a person soaks as it does from any additive put in the water.  With the Epsom salt baths I can also add in a bath bomb for a couple bucks more and enjoy the aroma and moisturizing effects of the bomb.  I'll stick with my routine.
Rating: 3 stars