I'm not sure i'd use this. Visual studio is a great tool, and is about 90% of the reason I use dot net.

That said, though it's improving, Javascript support still has a long ways to go. I find myself writing increasing amounts of it as Knockout and Angular become standard place. I crave to have some of the features that I have with editing C# while editing javascript.

If you provided that, i'd buy a license. Though my preference would be a plugin (like resharper) as opposed to a whole new editor.

I'd also pay a lot more than $75. I already pay $150 at home, and $300 at work for resharper, i'd pay the same for increased javascript support.