I've been working on my first child theme from this, and found it fairly intuitive, just a couple of quirks that some quick searching resolved -- like needing to use add_action( 'after_setup_theme', 'remove_excerpt_more_link' ) to override the markup for the excerpt read more link. A quick search in the support section here yielded the answer. No show-stoppers so far!
Thanks for your hard work on this theme, I hope to build some more sites using this as the parent.
Cheers to Konstantin and The Bootstrap!