Theanine and Ashwghanda work as expected. Both are great for anxiety. Being an Adaptogen, Ashwghanda in particularly is great for balancing stress hormones. I'm also part of the few people who get some noticeable strength and libido benefits from this amazing herb. I've taken both Theanine and Ashwaghanda individually from different brands and still can't believe I found a brand that's able to combine both without sacrificing the effectiveness of either — especially at this price point. I've never been that responsive to Rhodiola Rosea strains (I'm more of a 3% Salidrosides guy haha) so I just consider it a bonus on top of the other 2.99% of pre-made stacks just throw miniscule amounts of dozens of incompatible stuff together. The effects people usually get from such pricey stacks come from the stimulants in them like caffeine or theobromine (a derivative of Cacao). My rule of thumb for pre-made is that it's pretty much impossible for a supplement to do 3-4 ingredients well in a single pill. Don't fall for any BS brand that promises the benefits of 10-12 different ingredients. Most capsules only hold between 300-700mg while most ingredients need hundreds of milligrams to be effective. Common sense dictates that you can't put so much stuff in a single capsule and have it do everything effectively. There are companies on this site that will put as little as 25mg of an ingredient like Ashwaghanda or Ginkgo Bilopa, far from their effective dosages, just so they can tout its benefits for their product. The reverse is also true in that some ingredients like Noopept or Hurperzine 1% can be effective at doses as low as 10mg. In a 700mg cap filled with tons of stuff, there's no way to ensure you're not accidentally getting 20mg of Hurperzine which could cause a massive headache in sensitive individuals. And I won't even start on the synergistic nightmare that taking a blend of 12 products can be. Pre-made stacks are not only deceptive, they can be outright dangerous. Its stuff like that why most pre-made stacks and patented blends are highly discouraged in the Nootropics and Supplements community.With that said, kudos to this brand for putting together these synergistic 2-3 ingredient formulations where each ingredient is at an effective dose. I'm looking forward to what other 2-3 ingredient stacks that'll be offered in the future. Hopefully the racetams, mushrooms and/or amino acids. I'm already saving me money and on the number of pills I have to swallow each day.I also use their PS/Bacopa stack and would probably like their Alpha GPC stack if I weren't so sensitive to choline. I feel that the PS/Bacopa is much better for my sleep compared to this Stack.