I actually use this more than the iroha rin+. my only irk is the charger magnets do not align well. I will attach it and it flips in weird ways not sure if I got a defective one but it still works, just need to adjust a couple times. It's definitely strong and given me a new sensation of small electric sparks of pleasure. I love the design and it's pretty calming to look at. It's quiet but if you have thin walls definitely get it inder some blankets..