We stayed in room 312 and had the most awful stay in this hotel, couldn't sleep till 7 am! All night long there was an awful engine which started, very loud, some cleaning system most probably which extremely was loud and disturbing, impossible to sleep. We complained many times, they didn't have another room for us to change! The staff also acted like they hear it for the first time, since you could here the engine very clear loud. I'm afraid that even earplugs won't help!!