Although I enjoyed the lively, fruity flavors of these selzers--with the exception of the mango, since I've never been a big fan of mangos--I was very disappointed that I felt no effects from any of them. I have a high tolerance anyway, but I still expected to feel some level of potency, especially from 30mg, but I got nothing. Therefore, I'll be sticking with the Zero Gravity lemonade, since drinking even a third of the 100mg bottle is quite potent as well as very tasty.