Great library, great work - kudos to you for tackling a very tricky subject (I'm staying well away from CSS parsing and typography ... for now) My only concern

Great library, great work - kudos to you for tackling a very tricky subject (I'm staying well away from CSS parsing and typography ... for now) My only concern is whether this is (in startup lingo) a painkiller or a vitamin - as in, this is really nice to have, if you're that worried about kerning, but perhaps not enough of a pain-point for designers and developers to warrant learning a new set of nested and prefixed CSS rules, just to do something that's possible to hack together on a case-by-case basis with something like lettering.js... Perhaps if there's a way to simplify the syntax or provide easy copy-paste examples, it'll remove the barrier to entry? Still, applaud the work and the code looks great.