I wonder how this will stack up against Jetbrains PyCharm. I am always amazed at what the guys at how excellent PyCharm is, maybe Microsoft can do even better.
There's a lot of common ground feature-wise, but both also have their strong points. PyCharm's biggest one is that it's cross-platform, but also good integration with GAE and AWS, and neat features such as Cython editing. PTVS, on the other hand, is Windows-only, but has neat stuff like debugging Python and C++ side by side: https://github.com/Microsoft/ptvs/wiki/Mixed-Mode-Debugging
From personal experience, I've used both I have to say:
Python Tools for Visual Studio is one of Microsoft's "best kept secrets" is how I describe it. I would say they're both exactly well-built solutions. If you have Visual Studio I highly recommend you give it a shot, it's really well defined in my opinion. It also has a plethora of features[1]. However, when I'm on Linux I usually use PyCharm.
The problem with this is that it's an add-on to a bloated behemoth that takes 10 GB and a reboot to install and nearly that much memory to run. PyCharm has a lot going for it simply by being not that.