The two programs were brought up because no one can agree what should be removed and what should stay. You can run one cleaner program, remove a bunch of keys, then run another, and it removes more. There are none that are "right". That is what c627627 is arguing and it makes sense.
I brought up the point of speed and stability. How do you know that it is running faster and more stable? It just feels that way? Running the program didn't make it worse? Those aren't very good criteria for determining if a program is good. From what I see, these programs only get run because people think it helps when there is no hard evidence.
I'm not asking or expecting you to understand the intricacies of how these programs work, because that is ridiculous. Bottom line, these programs are a waste of time at best, and dangerous to your install at worst.