Hi Camilo, if you complete the check in process online before departure date, boarding should be smooth and quick. In regards the muster drill, Guests can complete the drill on their own time thanks to their new eMuster™ technology, which brings the safety information we need to our mobile device via the Royal Caribbean app and stateroom TV. Then, before the ship departs, every guest just needs to visit their assembly station-a designated check-in location-where their crew can verify they’ve completed the process. No more set time, no more large group assemblies. I have done it multiple times and it works amazing. I will be on the ship this weekend and I will post waiting times so you can use as reference :-) Love Royal