I started a woodworking business 6 months ago and have been looking for a laser machine to upgrade my handmade wood cuts and engravings, and the STJ1390 fits the bill perfectly. So far I have been using it to cut 1/4 birch plywood to create personalized 3D wood puzzles. The 100 watts of power is powerful enough and everything exceeded my expectations. Looking forward to the STJ1390 performing better on more materials. In addtion, the enclosure with light-filtering window is great for protecting eyes without goggles, and the built-in vent makes it easy to remove harmful fumes from burning while cutting and engraving wood. This protective cover is also fireproof, dustproof, odor-proof, and noise-reducing.