I only write short reviews:
First of all, as a prime lens, you either know you want/need it, or you don't.
If you DO need/want a 35mm equiv. FF lens, then, simply put, this is a tiny lens which performs as well as my Sigma 35mm ART did (now sold) in every respect, bearing in mind the M.Zuiko is for micro 4/3.
What this means is there's slightly less 'bokeh' to play with. But knowing what you're doing makes this a moot point.
And it's the tiny size which means I can carry this lens anywhere, any time "just in case"....which I couldn't/wouldn't do with the Sigma.