This product arrived in great shape with everything that was promised. I bought the fume extractor to use with our diode laser. It seems to work well, but I do find that I still need to vent the fumes when engraving some materials. That said, I do like it so far. I would have rated it five stars but for the instructions. They were next to unintelligible. I had to basically make a guess as to how each of the filter units were placed into the extractor. Hopefully I got it right. Additionally, my extractor' came with a bag of charcoal, while it's instructions showed a rectangular charcoal filter. Come on folks, the instructions should be the easiest part of you making this unit. Don't make this a guessing game for your customers. OK????