I&#x27;ve been using it while they were gearing up to MVP and I can dispel some of those:<p>1) there is none. It&#x27;s about as fast as PostMessage can pump data into an iframe, so it&#x27;s _much_ faster than something like live-server, and because it watches file changes faster than something like webpack, it even seems a touch faster than webpack-hotreload (although their MVP can&#x27;t do hotswapping of individual files yet)<p>2) fair point! I&#x27;ve found this great for PoC and article work. Just creatively write some code, polish it a little until it&#x27;s good enough to treat as a first push for a new repo, and then export the filesystem as a zip so I can push it up to git later. That said, I _have_ already made some things of which I thought I was going to put it on git, but then just kept working on in Thimble instead because there wasn&#x27;t actually any  reason to put it on git: The code&#x27;s already accessible because everyone can hit &quot;remix&quot; and I don&#x27;t need to deal with gh-pages branches because the project&#x27;s autohosted for free =)<p>3) not sure this one applies, since it&#x27;s explicitly for building web content. It&#x27;s an MVP atm so base html, css, javascript, fonts, etc. all work, and things like coffee script or JSX just require you to add a transformer library the way you&#x27;d do if you weren&#x27;t bundling code. No complaints on that so far (might change, but I&#x27;m pretty cool with what it does right now)<p>4) which one? <a href="http:&#x2F;&#x2F;blog.humphd.org&#x2F;thimble-and-bramble" rel="nofollow">http:&#x2F;&#x2F;blog.humphd.org&#x2F;thimble-and-bramble</a> explains that this is literally just the Brackets code editor, running in the browser, and pretty much any Brackets extension will work with it, so if you can find your favourite syntax highlighter and file an issue against <a href="https:&#x2F;&#x2F;github.com&#x2F;humphd&#x2F;brackets" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;humphd&#x2F;brackets</a> to have it added to the default set, problem solved!