@jdiegmueller, yeah, that’s what I am using as well - ST has been promising official Nest support since the beginning of time. About a 6-9 moths ago it was “weeks” away, and so I thought I would check in to see.
For example, per @ben here (in Sept 2014), it was “ready except for legal review” - then, per the Vaporware Developer Guidelines, it was updated to “weeks away at best” here only to never be heard of again… If community members like @Dianoga can do one in their spare time, certainly SmartThings can muster enough resources to do it.
Why do I care that it’s official? Well, @Dianoga’s solution is great (and as an aside if it wasn’t for people like him in this community, ST wouldn’t be worth it to me), but you need to know what you’re doing to implement it. “Civilians” are not capable. Also, if the code is upgraded, you have to manually do that. Something not working? You’re on your own.