I've used this unit for 3.5 years, and I've just replaced all of the interior parts (grates, burners, flames shields) due to excessive rust. The cost of replacements are almost 50% of a new unit. The outside shell of the grill has no rust but I don't know why there are excessive rust inside the unit despite regular cleaning after each usage, yearly maintenance at the end of the seasons, and proper storage. My suspicion is cost cutting for out of sight inner parts. The stainless steel parts are made of lower quality stainless steel, hence the rust.