The gain is non-trivial once your eyes and brain speak HAML fluently. It may vary person to person. Once you know both HTML and HAML fluently, your brain is g

The gain is non-trivial once your eyes and brain speak HAML fluently. It may vary person to person. Once you know both HTML and HAML fluently, your brain is going to find one easier/quicker to grok than the other. My brain happens to parse HAML a lot faster than fully bracketed HTML these days.