For me too.. And I'm usually extremely sceptical of food supplements and general quackery.

My joints have also been really cracky since I was a child. This seems a bit less but still present with the glucosamine.

But my elbow joints are often sore due to being on the computer way too much and every time I start taking it again it fades in a day or two. I don't think I'm imagining it :) Many other stuff I don't feel much benefit to.