I used it very heavily and exclusively for about 3 months. I&#x27;m not writing it day to day now but it was like having super powers in comparison to writing JS or Coffee.<p>I was using Visual Studio Community so I had all the benefits of intellisense (which is a big benefit), and I was able to manage a fairly complicated bespoke canvas thingo that suffered a few major refactorings - which I was able to perform with confidence due to the type checker.<p>The massive list of bundled typings and 3rd party typings makes it much quicker to pick up a new API or remind yourself of one you haven&#x27;t used for a while.<p>I now write C# day to day and I find I don&#x27;t spend the majority of my day alt-tabbing to and from documentation web pages as a result.<p>So... any bad things to say? None at all off the top of my head. I&#x27;m a huge convert, and not because &#x27;it&#x27;s nice&#x27; or &#x27;it&#x27;s pretty&#x27; but because it&#x27;s like wearing the Iron Man suit when it comes to programming. It&#x27;s helped me be more productive on non-trivial projects.