I started using it again after a long time and realized how good it was, so I've started using it again! I bought it last December, but the lotion version felt a bit tight, perhaps because it lacked moisture. I used it a couple of times and then shelved it. (My skin is thin and prone to dryness, so I prefer a thick, flaky lotion.) However, since this is a quasi-drug and contains many anti-aging and moisturizing ingredients, I thought it would be a waste, so I increased the amount I used to about the size of a 500 yen coin and applied a liner cream before it completely dried, blending it in. And boy! I felt a bit of a pulling sensation right after application, but after an hour or so, my skin felt so moisturized it felt sticky. My base makeup was starting to turn powdery with my current skincare routine, so this was a welcome rediscovery. I now use it three or four times a week in the morning. I believe pdc has formulated it to be very good at a reasonable price, so I want to support them. However, I've often been advised to use sunscreen in conjunction with retinol, which is sensitive to UV rays, but I wonder if the stability of the ingredients is a problem? I'm curious about that.