Atmosphere is $49. That's not alot to ask for a plugin, but for designers and filmmakers on a budget, the question always remains: is it worth it?
Unfortunately, with this version, Atmosphere just isn't—in terms of both money and time. There are too many workarounds in After Effects to achieve a very similar effect quickly.
The idea of Atmosphere is actually pretty cool. It just needs more options like background layer mapping and fog texture to make it worth the time it takes to work with and render the effect. With the addition of these features, I'd be eager to check out Atmosphere 2.0, but until then it looks like Atmosphere will not be in my arsenal of go-to effects.