"I was afraid to get this paint because of the negative reviews, but I'm glad I gave it a try because I love the Emerald paint!
Zero VOC - I gave it a try because I wanted a zero VOC paint that looked good and had good coverage. I thought it had a slight smell, almost like acetone mixed with clay or something - a slight chemical smell w/ the acetone but mixed with an earthy smell and not too strong. I'm very sensitive to smells (which is why I use zero voc - even low voc paint has too much smell for me) and although I noticed the smell for about 15 minutes, it wasn't strong enough to bother me and the smell is gone very quickly. I think this would work well for chemically sensitive people, nursaries, etc.
Coverage - I bought two gallons of Emerald in Satin finish - one a medium yellow for the foyer and one a medium green (ryegrass) for the kitchen. In the foyer I was painting over a tan and in the kitchen over a light to medium orange. In both cases one coat looked great from a distance - good coverage, but as with all paints - it always looks better with two coats to cover any thin spots and look fab up close as well. I was really impressed with this paint with such great coverage!
Applicaiton - I also had NO trouble with roller marks or brush stroke marks after applying the second coat (after first coat, some brush marks but no roller stripes). I found that after the paint dried, even on the first coat, it leveled really well - meaning the brush strokes evened out a bit, etc. I found it very easy to apply - which is a huge thing I look for in paints because I don't have the patience to apply multiple coats or to push really hard to get the paint on, etc. (bad experience there with Dutch Boy zero voc paint - wouldn't recommend). Emerald paint is thick enough that I didn't have problems with dripping (I would dip my brush and not even tap or wipe!) and minimal splatter when rolling - I have a habit of rolling quickly so thin paints splatter a ton for me - this one had very minimal splatter. It is not as thick as the Benjamin Moore Natura paint, but almost as thick (the BM paint was so thick it broke my wooden paint stirrer!). I also found that it is easy to apply in that it dries quickly (did second coat 60-90 min later) but not so quickly that you mess up your paint job if you backroll when you see a thin spot in your previous stripe or two and go back over it.
Finish - Finally, I think the finish looks nice and the colors were true. I think the satin is pretty close to an eggshell, though not so shiny I had to worry about the imperfections in my wall. I tend to find eggshell too shiny for my plaster walls in the living room, foyer, etc. but I think the Emerald satin finish looks good in the foyer and I would even use it in my living room where I usually stick to flat.
Number of coats - if you are selling your house and just want to slap up a coat of neutral to cover your blue wall you could get away with one coat if you apply properly, but as with ALL paints I've used and all paint store employees I've talked to at SW and other stores, you should always do 2 coats if you are doing it in your home you're living in and want to have a great looking even finish - as even good painters still will have thin spots in a couple of places and two coats evens all of that out and makes it look nice, even up close.
Bottom line - Highly recommended and I will use again!"