Tests of General Relativity
Should be renamed to 'Tests of General Relativity with GW170817', it sounds like a survey article.
The test confirmed GR. In particular the test results contradict theories with massive graviton and theories with "gravitational leakage" into the large extra dimensions of higher-dimensional theories of gravity.
The pdf is 15 pages, but really only 6 pages of it is actual content. Is it common for there to be 3 full pages of authors on a paper like this? Seems a little bizarre to my untrained eye.
So GR is right again, what a surprise...