I love this wanhao large 3d printer. I have zero experience with 3d printing and i got a good print on my 5th try and i think thats really good when you consider what you get for your money
3d printing is a learning curve and every printer requires some initial calibration. I recommend heated and dual extruder in upcoming version
The company is very responsive but I already had a few of those couplers on hand and just replaced mine myself.
The software is insanely fast at slicing and is easy to use. From what I've seen, all of the profiles are finely tuned and produce exceptional quality print.
The bottom line- the machine is well built, the software is very, very, good.The factory tuned profiles produce amazing quality.
I would not count my damaged Z axis as a problem, Wanhao has now changed shipping so that the Z axis is not connected during shipping to prevent damage.
I cannot stress enough, this is the heaviest duty printer I've ever touched. It simply is amazing what you are getting for the money. The entire top motion system uses a cast and then precision machined system to ensure it's one of the smoothest and tightest X Y systems around. Everything is easy to get to and robust.