Just got this plugin and I'm really liking it. I'm very close to purchasing the full bundle for the full featured invoicing in WordPress. The only thing I'd say is that while invoices can be displayed in templates and adjusted to fit themes, I'm finding the nofitication emails lacking in professionalism.
Loosely following this thread, I attempted to edit the plugin files(which I'd rather not do) to enable html content type so I could use html to change the layout using table and also to display images, however I was not able to get it working.
Also having links contained in
<a href=""></a> instead of the entire string being displayed would also make it a little more professional.
Is this a feature being developed in the near future?