This was my first major purchase from Vevor so I was a little aprehensive as to the quality of their goods. In all fairness I needn't have been, the vacuum chamber was sizeably bigger than I had in my head not being familiar with anything gallon based (being in the uk). It was plenty big enough for my usage and assembly was a breeze I cannot fault this product in the slightest. The furnace had a little kink in the outside mesh but this is purely cosmetic and affects the functioning of not one bit. I have yet to melt metal in it but I feel very confident that it will perform handsomely, the free crucible tongs that match the style of crucible are such a nice touch and save you more money on a bargain priced item. In this case bargain price does NOT mean cheap and nasty, this thing is well made and it is weighty instilling confidence in its construction.