This is a basic "Starter" template
You get what you pay for and this holds true for this template. Although, graphically it is a nice start to a SPA application, other than a basic menu and some basic screens, it has very limited functionality. What's missing is any one to many screens that have an example of how to do line items on Invoices such any an entry form that requires multiple inventory parts on a single Invoice document. That's a necessity for anyone creating an inventory/invoicing application and would show new developers how to properly program these screens for creating/saving/deleting lines. Ideally, the different menu pages would be setup as Reusable Elements that simplify the organization of workflows and the left menu would use Option Sets to display the menu options. Adding these 3 features would make this Template very good and show proper SPA development techniques.
I didn't have any issues with the template working properly. It has limited functionality and many things are incomplete but the menu and screens all worked fine for me for what was provided. I noticed some reviews indicated it didn't work but it works fine as of this review.