I've had the cz350ck for the past few days. A few salient points:
- It's a VA. It's a good display for what it is, but oh God, it's a VA. Coming from a nice 4k IPS, the quality is noticeable
- It's almost certainly a z35. I've seen one of those, and the panel looks the same
- Stand (which has the nice feature of attaching sans screw) and build is rather quality. Nothing fancy, but solid
- Color calibration was ridiculous out of the box, but spent some time adjusting and now is probably best VA I've used
- It can be OC'ed in NV settings to 120hz no problem; works with gysnc (on my GTX 1080 ti) no problem
I'd say if you're bent on getting an ultrawide, this is a great lower-cost option; if you're coming from IPS, be prepared for disappointment