I am trying this in 3.5 and I think it looks very pretty on.
I'm a lazy make-up person but have been on a grooming wagon lately. I'm 42, have some redness, pores, and a little sagging going on, so makeup helps.
I also have tried the Estee Lauder DL one after seeing some raves around here. That one is fine. I think it makes me look more "made up" compared to the UD Naked, which I think looks very fresh and glowy on me in comparison.
The other old steady I've always used when I do use foundation is Almay Oil-Free. That one's been fine, covers fine, and i'm not afraid to fall asleep in it since I'm a naughty girl when it comes to bed time face washing regimens.
So it's the end of the workday here, I've blotted twice (once around 11:30 and just now), and I can tell I still have foundation on. It looks nice and I'd be ready to go somewhere after work.
To be fair, I think it behaved better today with the new Murad mattifier and UD De-Slick I am trying for the first time today. Yesterday I noticed product settling in the nose pores, don't know if it was the foundation or the e.l.f. high def powder.
In summary, compared to EL DW & Almay Oil-Free, I'd rate UD Naked significantly above fine. I don't see why I wouldn't buy it again. It seems to "do something" rather than just sit there. I think it radiates.
I applied with fingertips. I can't get used to putting a dry fluffy brush to liquid foundation yet.