The core features work great (albeit the schematic and board preview are a bit sluggish compared to the rest of the website). I would also like to point out that the design of the page is really eye-pleasing. The GitHub-like file browser is visually pleasant and feels familiar without being a direct ripoff of GitHub.
Unfortunately I found a few minor problems concerning authentication. Namely there is no way to use ssh keys when pushing with git. This is a real bummer since I use generated passwords which are stored in my password manager. Pasting passwords with special characters (which are a requirement in your registration form) in terminals is sometimes a bit cumbersome on some platforms. The second problem I noticed is that you cannot change your password when logged in (without using the "I Forgot My Password" option).
Cheers!