I had only used it a few times. I have used it on top of foundation and tried using it alone. It's better to use it on top of foundation if you want coverage. If you're too oily, you'd need to retouch in like 4hrs. But I noticed that dark spots on my nose became more prominent after using it alone so I got disappointed, I wonder if it does really happen.. But as sebum control, it works just fine.
Pore Master Sebum Control Pact (10g)
Keeps my skin oil free for hours.
Does the job, makeup generally lasts the whole humid day, except expected oily patches on t-zone, but then again haven't had any powders done better for those areas.