Free icons are always great, and SVG is super flexible and the future, so this is great. Not the easiest to implement.

Pros:

Free, SVG icons which are very flexible

Cons:

Not so simple to implement.

Neat shape and edges! and implementation should not be a problem if the consuming app has a SVG-icon implementation technique in place as we can download the raw SVGs.

I love it!

Pros:

What can be more amazing than free icon set?

Cons:

No