Goes on smooth. Having an active paint makes a lot of sense especially in rooms where you do a lot of breathing and living.
To start with I used this paint in my master bathroom. The vibrant light blue of Barcelona Blue works well with my white marble floors and shower. It’s a satin paint, not a gloss. The paint is a bit ‘thick’ and the manufacturer actually suggests thinning it with a cup of water, which I did. This helped it go on easier and did not make it too thin. One coat over a light beige base paint was all I needed. (maybe a few touchups here and there.) Dried within an hour, at least to the touch. Clean-up is easy with soap and water. I did have to run out to Home Depot and buy an empty gallon paint bucket for a few dollars, the base of the plastic bucket was put down too abruptly causing a crack and a leak – fun. So just a warning, be gentle with your bucket. (Not the fault of the product itself.)
One last thing to mention: I did have a concern about using this paint given this is an active coating. You are using UV light to activate something to change the chemical compounds from X to Y. This of course got me wondering, what is the by-product? Meaning you don’t magically lose molecules of bad things, like dust or mold, so what is the resulting item? I reached out to the manufacturer to see if they could tell me, didn’t hear back. Further online digging on Activa Coating shows the byproducts are Gypsum, Calcium Nitrate and Limestone. Which are apparently safe. Would have liked to have found a study or a white paper on the subject. But this put my concerns aside and it looks top notch.