I bought mine a couple weeks ago and have been using it twice a day from 4 to 5 min all the setting except air shot total 15min twice a day, and I love it a LOT! My skin is usually sensitive but I haven't been having the problems ppl say in other posts. Quite the opposite, my skin improved in everything, texture, lines, hydration. I specially bought it bc I was starting to see a lot of lines around my eyes and recently I've been seeing results. The most surprising to me was how much my pores got smaller, I'm starting to think I just been dehydrated my whole life (F27). I will say one thing, with the device I have been applying a lot more product, each setting I apply a good amount so the device glides well and I think it makes specially a difference in the massage mode. I keep track of everything in their app and change the light to red, so that's nice. So, yes, it makes my face a lot more "greasy" because I am applying a lot more product, but in the morning I apply make up straight after and just powder it up, is fine. At night I just wait until it is reasonably absorbed to sleep (I live in a place with very dry winter but I grew up in the amazon, and there with all the humidity my pores were still very big). So yeah, overall amazed with the product. Side note, I am mixing the medicine age serum and eye cream with my own products dalba spray, dr G snail moisturizer, vitamin c, innisfree retinol, peptides serum and occasionally a face mask, for sunscreen I use dale also.