Bought for $64 as Mophorn, but I was shipped an amazon warehouse unit labeled Vevor. I think they are all pretty much the same design... a hot pot on the bottom with a air-colled fan to recondense the steam in a coiled tubing on top. This unit satisfies two main needs for me: 1) distilled water for my sleep apnea CPAP, as for some reason it's hit and miss whether you can find distilled water in stock at the pharmacies and grocery stores.; 2) to remove PFAS contamination and mineral flavors for drinking and cooking water. I've run the unit dry and the overheat protection shut itself down fine. And, there was plenty of mineral deposit left behind. I was able to quickly wash most of it out with soap, water and a bottle brush. A few small thin deposits were left stuck to the bottom.Since I bought it as a Warehouse deal, I could immediately test the citric acid powder that comes with the unit to dissolve the previous user's calcium deposits. It cleaned up to 'like new' condition easily.The one thing I'm keeping my eye on is a bit of light rouging (slight rust discoloration) in the lid area. Interestingly, it's only in the lid; so, maybe a cheaper grade of stainless steel is used there. It is easily removed with a pumice stone, though aggressive scrubbing with citric acid paste would likely work if you have the elbow grease. Nothing alarming yet, though I also did notice some mineral films on the lid that were likely from the violent boiling that goes on inside, especially when starting with a full pot.Overall, I am pleased with the unit. It's generation rate appears to be as advertised (1 gallon within ~2.5-3 hours). The fan is a bit loud if you'll be hanging out nearby; but, you can always run it overnight or when you go out shopping.I have very hard well water and had been buying and lugging home bottled spring water at ~75cents/gallon, or distilled water for $1 or more per gallon (if it is in stock!). That's a lot of plastic bottles to go through. I calculated that, a