i'm not very familiar with EcoWorld & i've only seen an ad about how good their sound insulation is for their product. but as far as i'm aware of being in property sales & management before, no developer in malaysia has ever conducted a sound test & release a sound certification for their products like advanced countries. ended up what we can see is even high end properties in affluent areas like mont kiara & desa parkcity have poor sound insulation. northshore garden @ desa parkcity is a notable example. open/close door/cupboard, talk, argue, baby play ball, make love, neighbour next door or below also can hear, everytime complain to office say can't sleep. best part is they won't say their neighbour was making love, they said domestic abuse wtf. all these developers are playing the fool. platinum victory is also a famous one for poor sound insulation. they say you make love in your room, people outside in the living room can hear.