I bought this item as a spare part for an Ender S1 Pro which already features this direct extruder. It is a good system, easy to handle. The Pro version is full metal. Having a second extruder allows me to make maintenance on one while running the second one. It was a deal for Black Friday. I am pleased with the extruder, I’ve been printing TPU, CF-Nylon, ABS and of course PLA with no issue at all. The only thing I believe would be better for a s’are part: selling only the extruder, not a full kit containing brackets and other stuff I do not need.