After the successful berthing on Friday, the ISS astronauts entered the SpaceX Dragon capsule for the first time on Saturday. They seemed to like what they saw, remarking that they would be willing to ride to the ISS in a human-rated Dragon in the future and commenting on its roominess when compared to the Russian Soyuz capsule crews use today. The Soyuz was originally a two person capsule, later updated for three in the same volume, while the Dragon is designed to carry seven crew – so it is no surprise that it is quite a bit roomier.
NASA TV shared videos of the opening and initial entry, as well as a Q&A event with the astronauts inside the Dragon: