These are proceedings of the IAU Symposium 338 “Gravitational Wave Astrophysics”, held in Baton Rouge LA on October 16-19, 2017. My contribution is based on arXiv:1707.04637, where we look at the first binary black hole data using different Bayesian priors. During that conference, we had the announcement of the first neutron start event, GW170817, and I was presenting black-hole science: so obsolete…

**Davide Gerosa**, Salvatore Vitale, Carl-Johan Haster, Katerina Chatziioannou, Aaron Zimmerman.

Proceedings of the International Astronomical Union, 13 (S338), 22-28.

arXiv:1712.06635 [astro-ph.HE].