OK, "first impressions" after a very quick tour :

1) *VERY* impressive for a "0.1 alpha" ! :-)
The UI feels nice, connecting and moving around inside my account, looking at things, all went well. Haven't tried editing/adding stuff yet.

2) feels a little slow at collecting items while entering a notebook, but maybe that's just the Evernote API...

3) a couple of issues:

- does not always fail gracefully in case of network problems (like on startup ?)

- encoding problems with non-English text. Are you using UTF-8 ?...

All in all, a great start ! I hope you can fine-tune it and turn it into the killer client Evernote should have done themselves :-)