My friend and I stayed at Big for two different nights. The first night we were given a room at the M floor. The room was a little dark and the air conditioner was not working well. No window. I felt hot the whole night. Saw a cockroach in the room but it scurried away. It was not good at all. The second night was better that our room was on the 2nd floor. It was a little bigger with a window. The air conditioner was good. A small incident on the 2nd night, we were given a room that someone was already in there. It was made right when the host came find us with the right key. The staff was generally nice and friendly.