I've been taking this for about four months now. It has helped me immensely. My moods are less chaotic, and I feel more positive and less stressed. I've recently started combining it with DL-phenylanaline (DLPA), which is an amino acid that is supposed to induce endorphin, serotonin, and dopamine production and it's cut my anxiety down quite a bit.
It's important to get a good brand, and to get the dosage right. I started with 300mg, three times a day for the first month. After that, however, I've been able to cut it down to one or two 300mg capsules a day, depending on how I'm feeling. I have to avoid taking it with meals because it seems to dilute the effects for some reason,but taking it with the DLPA seems to be fine. It took about three weeks to really start working for me, but once it did, I could feel the results much more immediately after taking each capsule. I experienced some sun sensitivity in the first three months, but that's actually subsided for some reason and I don't have that problem anymore.