It is great to have invoicing and accountant program perfect for swedish companies (SIE export/import) that works in Linux. That it works under "all" modern desktop OS is great. I bought it when it was commercial in 2008 and me and my wife still use it :) It is nice to see development continues and we will soon test the new version.
It's useful if you live in Sweden and have fskatt. I managed to enter 30 or so transactions and produce a SIE file for my accountant with it. Looking forward to a proper release.