Pretty good
I've been using this for a week or two now. As with any vitamin or supplement,  I've witnessed no miraculous change since I have started it. However, I can say my normally creaky joints seem to be somewhat more oiled- part of one of the claims. There is no real way to quantitatively assess my change in memory, but it certainly hasn't decreased. Overall, I'd say fairly decent purchase that I'd recommend to friends or family.
Rating: 4 stars