Fabulous! Currently I'm using the web solution Blinksale and have to pay quite a bit extra to send PDF invoices or more than 3 invoices a month. Which I do. It's not a huge amount of money, but the updates are few and far between as is the control.

This web program is what I've been looking for and here's my wishlist to the Developers (if the read these comments).
1. Invoice counter (or something that shows you what your last invoice number was)
2. P.O. Number (this could probably be a custom field) I usually just put 'Verbal'
3. More invoice templates!!!! With thumbnail previews and a easier way to make custom changes, i.e., logo, tax ID# (if necessary), etc... I found it hard to find these and some I still haven't
3. Different templates for Estimates and a way to add large amounts of text that estimates generally have (disclaimers, timelines, rights, etc....)
4. A choice to send invoices as HTML emails, HTML emails with a PDF attached, or just a PDF attached. I sent a test email to my email account and the body of the message was empty. No biggie, but it couldn't hurt to have one's company name in there (if you choose not to do HTML emails).
5. Back to estimate templates: They don't have to be fancy. You can sign up to blinksale for free and see what I mean. It's more of a color scheme changes and fonts that make them different.
6. Ability to send a thank you note after a payment is made (again, using a nice looking HTML email, not a PDF).
7. Ability to send reminders automatically (if you can, I couldn't find it! Sorry!).

My motto is to see what the competition is doing (blinksale), and do it better, faster, and quicker. And I love being able to upload the whole caboodle to my site where I have total control over it. I'm not a PHP programmer hence my harping on the pre-designed templates. Again, nothing fancy.

Otherwise, I think you folks have done an awesome job and since as you say it's still in the oven but ready for use, I'll hold off on rating the software. Right now I'd give it FIVE stars for effort and Four stars for the implementation. Thanks you!

I have it working smoothly in my Imac, using MAMP. There is just one thing that I had to fix for the reports to work but was simple and found the answer in the wiki. http://simpleinvoices.org/wiki/doku.php?id=using_simple_invoices_on_bsd_or_darwin
and by the way is a nice community with people willing to help. Other than that fully recommended for a simple invoicing process