Fantastic! Delivered on time. I felt incredibly better the very next morning after my first day taking this supplement. Great sleep and woke up feeling refreshed and with happy, cheerful mood. Best results I have had with any single supplement I've used. Magnesium "Breakthrough" is outstanding, in my opinion, and makes it to my top list of "must have" supplements. It's only been 3 weeks and I see better improvement in muscle tone and development. Mostly, I just feel good again. Magically, muscle and joint stiffness have disappeared. That alone makes me feel 30 years younger. Highly recommended for anyone that wants to look and feel better.