Inter features a tall x-height to aid in readability of mixed-case and lower-case text. Several OpenType features are provided as well, like contextual alternates that adjusts punctuation depending on the shape of surrounding glyphs, slashed zero for when you need to disambiguate “0” from “o”, tabular numbers, etc.

The overall impression is Apple-ish, polished. I would expect to see this only with the most tasteful of photographic elements. It might be too contemporary for the style of my projects, but I’ll bet people can do cool stuff with it!