You get what you pay for. There are many reasons this unit is several hundred dollars cheaper than comparable products. First the controls are almost as confusing as the manual. The temp dial feels like it is one turn away from breaking. The front readout should show the current room temp instead all I have seen is E1, E3, or 99 when the room is in the 70s. The error messages are because the unit is constantly full of water or the condenser is frozen over. I use this unit in an 8x10ft room with high temp around 85 degrees and only need to cool down to 75. It actually does an effective job of cooling for a few hours till the unit freezes up or the supposed automatic drain through vent fills up the reservoir.