Any company that doesn't transform itself around this technology will be left behind. It always saves the day. It should get its own costume. A robust product is one that doesn't break easily. It doesn't come with guarantees, though.
Functionality sounds like something sleek and streamlined.
There's efficiency for you. It's not too hard to get your mind around it, though. It means that something is strong. It means that something does something. And there you have it.