Deep fryer is extremely easy to use and keeps our oil clean with the sludge filtration system. The air filtration installed in the deep fryer also helps maintain the oily smell from getting around the house and keeping the air in the house fresh even after many rounds of deep frying food. We have bought many deep fryers in our time and this is definitely the BEST deep fryer we have ever had. We would keep buying them again in future if you keep selling them. :D