Clean, Commented Markup.

Nothing's more annoying than selecting a framework, getting your site set up - and then finally looking under the hood to discover the template code is a nightmarish mess. If you can't understand what's going on in the template code, how can you possible maintain, extend or customise your site?

I've suffered that nightmare enough times to know that while clean, commented code might take longer to write, it rewards everybody tenfold when it comes to support, maintenance and extensibility.

That's why all of the templates that ship with Bootstrap for Shopify are meticulously documented (including links to external references where useful) and carefully crafted.