The UI is looking great, and it is well integrated with local development and ftp/cloud services. The browser preview is also integrated.

It's a very user-friendly code editor. Syntax highlighting works well and the CSS editor (which was based on the one previously used in CSSedit) is really nice to work with. Unlike apps like Adobe Brackets, this is a native Mac-developed app, so it works well on all newer Mac's. I learnt a great deal about modern web development, through using Espresso. Features like snippets are really useful and I wrote my own 'sugars' for a couple of CMS platforms.

CSS Editing, built in FTP great for small projects