If I had written this a year ago, it would have been a rave. But there was a mistake in my order, and instead of fixing it, they just lied. They said they had changed the size of the pill, and that it was still the same product. I pointed out that the catalog still gave the old size pill, and they said they'd fix it for the next catalog.
Except they didn't. There had never been any size change, they just lied about it.
Since the supplement industry is so unregulated, trust is more important than for other products, and I have no more trust in Puritan's Pride.
Updated 8-11-2016: I take magnesium and calcium to prevent night-time leg cramps. While I was taking the Puritan's Pride products, the leg cramps got worse and more frequent. Since I changed to a different provider, I haven't had a single cramp. Same supplement, same dose, totally different outcome.