I have tried several brands over my lifetime but to no avail, but this one actually works.I am half Italian and have oily skin to begin with.I use it while taking a shower, for I use it on my legs.That is where my acne is and always has been.I also use Melaluka acne cream.Between the 2 I am almost zit free. Effectiveness It takes at least 2 uses to have a noticeable affect that is also with using a good ance medication. Ease of Application I use it while I am taking a shower because most of my acne is on my legs. Convenience It is like most products,just squeeze it out and apply it to the affected area. Side Effects I have been 99% acne free by using this product on a regular basis.It Is a little expensive by itself, but I think it is well worth it at 54 years old. Immediacy It is not immediate, it will take at least 2 days for a noticeable affect.After washing, make sure you use Melaluka acne medication.Between these 2 products you will hardly see any more acne within 3 days.In my opinion.