That offline feature will be VERY important. I know a LOT of companies are looking for solutions to inputting data reliably on mobile devices when there is no connectivity. It's critical to maintaining a professional appearance, it's a very important feature!

I think showing some different invoice designs helps visitors get to the 'ohhh this is aimed at me' moment a lot sooner.

So if you have a mockup of a real estate invoice or a photographer's quote, perhaps a pharma rep pro forma, seeing industries listed are what helps people to identify themselves as a potential customer.

After all most visitors arrive at a site with the mindset of 'this might be something not applicable to me / my business' that's when they look for anchor points :- industry references, technical jargon, credibility from recognisable brands in their field. As soon as they see something familiar, they are like, 'ok, this is something I should pay attention to'

Do whatever you can to tell your target market 'you, yes YOU are my ideal customer'