Sorry, know you're not supposed to bump old threads but this was on the first page.
Apparently Natura is now out of production (maybe will come back after the shortage?) and BM stores are pushing Eco-Spec instead of Natura. It's definitely cheaper, our stores charged $39 a gallon. We got a gallon of white Natura for trim of old stock.
I used a couple of gallons and imo found it like Promar 200 or so in quality. In a gray it covered amazing over dark chocolate brown walls, not quite sure on color accuracy. I found it easy to handle and nice. Only problems we had were my boss liking to push recoat times and he had problems double cutting (which I don't like to do, but you know, if it's not your own job...) and it tearing away at his first semi-dry cut. If it was my own job it wouldn't matter and I'd not double cut and let everything set up longer, but alas, that is the problem with working with other people.
It was a basement in a forested/humid area with rain most of the week, over walls painted in a glossier eggshell/satin with the brown tint likely being oil based and really sealing everything, so dry time was actually really really long. After rolling walls it would be 2 hours before it even looked dried to the touch in some parts. I think it's just conditions but I'm almost certain Regal or Aura would dry way faster.
Smell was about non-existent and I actually found it pretty cool paint overall, coverage is great, looks decent dried (though the eggshell is a glossier eggshell, really actually looked identical to PM200, since some of my last gallons of PM200 were in almost an identical gray.) I think Ultra Spec is probably better, as Ultra Spec seemed to dry/cure to a much harder finish (imo, dries as hard as Regal) but Eco-Spec maybe covered better? The hardness and all that, too could be from the paint not curing well enough with the conditions.
Natura on trim really surprised me, but it too didn't seem to cure up super hard, but again it could be (likely was) conditions. It LOOKED amazing, though. Very high gloss and very bright white. Could be conditions but it did run and sag and need a very light touch to apply, it reminded me a lot of latex Proclassic but better. Good news even the runs that came a long time later could be hit out and it would level back well. Since it's out of production it's irrelevant but it probably would have been a good competitor to latex Proclassic.
So yeah, definitely not bad paint, just expect something near PM-200 and you'll be happy.