I have had a good deal of pain in both knees over the past few years following some tennis injuries (torn meniscus/torn cartilage). I had surgery to fix both of them, however even after the surgery I still had a significant amount of pain. I was comfortable buying Penetrex because of the "Relief Guarantee" that is offered, although I don't need to use the guarantee because this product has done a good job with easing some of the pain and aching I feel in my knees. Penetrex is also less expensive than some of the other less effective joint relief products I have tried in the past. When I started using this I was applying the cream 3-4 times per day. Although some days I was able to put less on because my knees weren't as achey. I would usually put some on when I woke up since I tend to have the most pain in the mornings. I only need about 2 finger scoops per knee and you only have to apply it to the areas that you feel irritation. I like to apply this cream 30 minutes before I go to the gym because then I am able to use the elliptical without a large amount of pain. The cream itself isn't greasy and you can pretty much put it on at any time because it doesn't take long to absorb into your skin, I only have to massage it for about 1 or 2 minutes until it's completely absorbed. After it absorbs, I put on my knee brace (I don't use anything super fancy, just 

I ordered this product because the majority of the reviews said it smelled good. I know that was a risk on my part because smell is a matter of opinion, but I did not like the smell. Also, the bottle says it leaves your hair soft but I feel it makes my hair sticky even though I use a small amount. Overall, not impressed.

A very useful book for math-teachers, both for the youngest and the mature students. The discussions about "why? and what for?" can be lifted above the usual level where "like and like not" own the arena. Also interesting for philosophical oriented teachers with