It works well for me. On this rom anyhow. I don't know what other people say, I can only speak for my own personal experiance and those settings with SetCpu on this rom are great. What may be great for me may not be for you though. These things are odd like that sometimes.. Some people have issues while others don't. It woudn't hurt to try and see if it works out for you or not no? and like I said, those settings were made up and posted by someone else, I forget who, but I saved them because I knew at some point I'd need them again or someone else may want to see them. But with those settings I don't get any lag, I get good speed, and great battery live. I'm using the Blaze 4G radio incase anyone was wondering.
▐ Phone: T-Mobile ISamsung Galaxy s 4▐
▐ Tablet : Samusung Galaxy Tab. 2 10,1
[Tmobile Samsung galaxy s4. Android 4.3- complete stock] - For the time being