I have a X-ONE (one of five printers). It is a good solid printer. It is however a new printer but that doesn't mean a bad thing. The build size is 150mmX150MMX150MM. I is a single extruder with cooling fan and heated bed.
You can print with SD card or USB.
The included slicer does a decent job (I think it is a Cura derivative). S3D is working on a profile and did include it in their recent version release so it is a starting point there.
All in all it is a solid starting point. I have not been disappointed. I have struggled a little getting slicers tuned for great prints but that is with any printer I think.

I have two QIDI printers and their support is outstanding in my opinion.