I'm someone who religiously applies sunscreen without wearing makeup. My skin is dry, and mineral sunscreens tend to make my skin feel parched, so I prefer hybrid or chemical formulas. I usually layer on plenty of toner and emulsion beforehand. The Face Shop's sunscreen left residue, and I think it was A'pieu's that irritated my eyes so much I couldn't use it. This one is great because: 1. It doesn't sting my eyes, 2. Even when applied hastily, it doesn't leave any residue, 3. It has just the right amount of white cast (which I like since I don't wear makeup), 4. It has a bit of oil content, giving a nice glow (I prefer a dewy finish). The quantity is good, and the price is reasonable, especially with frequent buy-one-get-one-free deals.
Occasionally, it's hard to tell whether the sunscreen is still on my skin or if it's disappeared completely.