Hi Master Lee, can help to check for BISHAN RIDGE which unit is best :-
1) UNIT NO 120 (NE3 facing), living & all rooms facing kallang river but main door facing the lift lobby
2) UNIT NO 118 (NE3) & 510 (NE1), living & all rooms facing kallang river but main door along the common corridor
3) UNIT NO 520 (NW3), living & all rooms facing kallang river but main door next to staircase & facing neighbour's main door (UNIT 522 - SE3)
Or you may advise which is the best unit for 4-ROOM.
tks Cindy