I chose this machine as an upgrade from my current one. My current machine has no adjustment to the stroke and can use a battery, but it is more entry-level.
I picked this one since it's from XNET, is cordless, has a USB-C rechargeable battery, and has an adjustable stroke length. I opened it, and out of the box, It ran smoothly and quietly.
I have already used it on one tattoo. The battery never faltered during the 3-hour application. I'm saving this machine for clients and myself and using my lower-end Dragonhawk for ReelSkin practice.
I'm very happy with this machine so far.