I don't consider myself to have 'acne' but I do get small breakouts about once a month (you can guess when that happens) and I do have enlarged pores on my t-zone. I did, however, have pretty bad acne as a teenager so I have used it all. The drugstore cleansers, the prescription medications and creams, even ProActive did nothing for me. As my hormones have evened out I have thankfully gotten past the acne stage, but the enlarged pores remained. I tried the painful strips, creams, I wash my face excessively, nothing helped until I found this stuff. Just overnight I can tell a huge difference in the size of my pores and it even helps even out the redness I have in this area. I only use it once a day, in the evening after washing my face and it seems to be sufficient for me. I do think using it twice a day would probably cause problems with drying the skin but I haven't had a problem with this routine yet. Effectiveness It is the only thing that has worked to reduce my enlarged pores. Just overnight they are significantly smaller in size. It doesn't seem to help as much with my hormonal breakout each month, though. Ease of Application A very small amount goes a long way. It is slightly gritty but absorbs well and dries pretty quickly. I do not apply near my eyes. Convenience The product itself is very convenient and easy to use. No steps to follow, just apply and you are done. I reserved 10 stars because it isn't available in stores near me. I have to order it online and sometimes forget to do so before I run out. Side Effects My skin gets pretty 'tight' after applying, so I can imagine it could cause problems for people with dry or sensitive skin but it hasn't given me any problems yet. Immediacy I didn't expect any results from this product since I hadn't seen any yet from other more expensive products, so I was amazed when I woke up the next morning after my first use and saw how great my pores looked.