What you purchased is only about 20HU. It will work, but you could do better. I used the McCormick stuff for a day or two. Then I got some organic cayenne from the Health Food Store. It was only 30-50HU (I think), and it was organic. The main thing I noticed was that it tasted SOOOO much better - and it didn't seem a bit hotter. It was so much easier to drink than the cheepo McCormick stuff. I was surprised to find that it wasn't really that much more expensive either.
I'm getting geared up to start another MC right now. This time I am going to order some organic 90HU. If anyone has a source for that that they would recommend - feel free to post it for me. I do appreciate it.