Not as evil Evil (in the most negative software sense) as iBiz, but unfortunately Billings (as of version 3.6.1) does still lack some very basic and common-sense features, some of which are present in iBiz, and Billings has some shocking bugs. Do NOT rely on the prevailing notion that it is in any sense award winning. You trust instead Dr Darren of Webel, who says:

I can easily win an award in sewer navigation if the only competitor is up the poo creek without a paddle.

We are after all talking about the least honest and least ethical business in the world, namely Software Development.