Not only power. It's a nice trick for non-designers to create nice looking designs. But you have to keep in mind to use only 2 or 3 sizes of padding and margin.

Not only power. It's a nice trick for non-designers to create nice looking designs. But you have to keep in mind to use only 2 or 3 sizes of padding and margin. For example: 0.25rem, 0.5rem and 1 rem.