Hi David - is this for commercial or domestic work?
I'm planning to add the option to print sheets of payment slips (mini invoices) soon for those who issue slips for domestic work, these will automatically include your company name, logo, contact details, clean details, price and payment details (e.g. BACS info).
You certainly can raise invoices for domestic work and doing this from the worksheet is as easy as clicking "Create Invoices" and then "Print Invoices" to print them all in one shot, but personally I think fully fledged numbered invoices are a bit overkill for domestic work - what are your thoughts?
In the end you've got complete flexibility really, you can download, print or email invoices, or you'll soon be able to print sheets of slips

Another nice feature we have is the option to "Collect emails". When enabled this automatically includes an "Ask for email" reminder on the paper sheets (and soon in the mobile app) next to each customer for which you don't yet have an email on file. This reminder only occurs once for each customer, so you don't end up pestering someone who doesn't have an email address!