We loved our stay at Sonder. The train is loud it sounded like thunder every time it passed by, but it didn't bother us much. We are not light sleepers, though. However, the music from The Wharf, which is right next door, on Friday night was VERY loud. The earplugs and white noise didn't help at all. They also had music on Thursday, but they closed by midnight, so that was bearable. Luckily for us, we left early Saturday morning. We were there from January 2nd to the 7th. We really enjoyed our stay except on the night of the 6th when we hardly got any sleep.