I have had this printer for a little over three weeks and despite a few initial bumps, this is the best printer I have ever used. The printer itself has a strong outer alloy metal frame, the components inside are high-quality (The stepper motors and extruder are much nicer than what I have on my Makerbot Replicator). The heated bed works great, and stays level (I've only had to adjust level once or twice). The only downfall to this printer out of the box is the modified version of Cura that it ships with. Initially, I was getting a jam after every two prints. However, once I switched over to Simplify3d (which includes a profile for the x-one), I've had zero issues. In fact, this printer has printed everything that I've thrown at it. (You can see a Dinosaur Skull I made here: Printed Dinosaur Skull - Qidi x-one
I also want to mention how wonderful the Qidi support staff are. On my first night of printing I had a jam that I couldn't resolve no matter what I tried. I emailed Qidi's support team, and within 40 minutes or so, I received a video helping me clear the jam. Considering the distance between China and the United States, I'm impressed at the care they take to support their customers. I've never received that kind of support from Makerbot when I try to reach them.
Qidi seems to be a sleep company on Amazon, they are easily overlooked, but for the money (and maybe even a lot more money), this is a fantastic printer.