My AC is constantly on around 70-71, and my huge fan was on the mid-hi at all times. If it were quieter, I'd have put it on max, but the damn thing would drown out even good speakers. The Vornado is sooooo much cooler and quieter, and if I ever get hot, I have two more stronger settings, which really move air in the room. I literally have the fan aimed at a corner of the room, and feel the air as if the ac was coming from that corner of the room.
I need one because summer is on its way and I'm fat.