I chose a 5-star rating because this is as high as I could go! I have tried a lot of supplements in my life, some that worked and some that didn't. No bad mouthing, just everything is not for everybody.I had never heard of L-Theanine, and did not know of its benefits, because I really did not like the taste of green tea and avoided it at all costs. Who knew!Well, my work situation is about to become a little more demanding, as my teammate is shortly expecting a baby and I will carrying on in our job function primarily alone. I am not worried about keeping up, but those around me are starting to stress me with their fears. I wanted something to help me maintain my cool, and mitigate the stress that I am experiencing from the worries of well meaning people. So I Googled stress relief supplements and L-theanine came to the top of the search. As I am an Amazon convert, I came to the site and found a plethora of choices. I chose Country Life's version because I know that Country Life products are gluten-free, and that is a must for me (another story for another day).I received my shipment 2 days ago, and following the advice of my fellow reviewers, I took one capsule 30 minutes before bed. I went to bed late, but awoke refreshed with no hangover, like you get from sleep aids. Also, Celiac Sprue sometimes causes neurological issues. I wake up with numb fingers, even though I have a memory foam mattress and have few pressure points. That morning I awoke feeling like I had been on vacation and no numbness or tingling. Even more so I have suffered with chronic tendonitis of my ankle, constant pain, stiffness and some swelling. One dose of L-theanine and the pain was by half. Two doses (I took my second dose the next morning with coffee) and no pain. NO PAIN! And no stiffness.Then I read that it can reduce inflammation, too. Hey Now! I had gotten used to this pain and the numbness in my hands as a common occurence that I would just have to live with and now I have hope of pain free days.I may be premature, but I am going to keep on with this regimen and keep you posted. I feel good both emotionally and physically, and the physical relief was an added treat.