How customizable are the templates?
The short answer: very. A semi technically skilled person can easily customize items such as placement, fonts, colors and images. The engine is very powerful and flexible (evidence: the best invoices anywhere), and as with anything with such power and flexibility, expertise is required to get the most out of it. Since the engine is shared with Daylite and Billings, there is existing knowledge out there. Concepts can found here (PDF). Billings 3 template layout and design movies can be found here. You can find Eric O’Connell’s Daylite Report Fundamentals book here. You can find partners that have expertise here. You can purchase some canned templates or custom templates here and here.