I like that it's easy enough to use but not too simplistic! There are many features that can be used in different ways depending upon your needs at each stage of development. It would help if there was more guidance from experienced users about how best to work through those options - i know this may seem nitpicky (which isn't meant as such), however we've been using tachyons without anyone ever teaching us anything when working within our team so far. We're solving problems related to data analysis across three separate products which have very similar codebases/components; therefore creating shared libraries between them has helped save time spent reworking existing parts rather than having duplicate components etc.