Most of the posts highlight what I am focused on and express work and personal experience. Reason I put them here - recall later or help someone else with similar challenge.
Materialize CSS is one of my favourite CSS constructor for building pages prototypes.
It contains (comparing to bootstrap) all things, that might be needed for developer (at least I was missing select with stylish options, always third-party tool). And it is Google driven!
It has few little glitches, but easy to have them fixed (i.e. layouts glitches with z-index levels, callbacks for image upload). Bring your comments below if you need more details.