Very well made. Grips the filament firmly. Came with high quality couplers for the bowden tube. If you're upgrading your Ender 3 you will need to adjust your e-steps accordingly as the diameter of the wheel is significantly different from the stock single drive plastic extruder.
the quality is the worst I have seen on 5 different supplier of these dual gear extruders. gear teeth are completely worn and defective. I opened a dispute to get refunds high enough to Rebuy better gears. seller disagreed and AliExpress also decided that quality issue is valid but defective on arrival is INvalid... so I got only a few penny's back. I really start to avoid AliExpress more as their decisions have gone bad the last 4-5 years. ah and by the way: this product is highly NOT rexommended