Annoy Tools/ Cronos Controllers

I just bought an Annoy Tools Controller that is a copycat of a Cronos controller. Like all the other China made controllers, there is not much information on it. It is well made but the website only shows the pinouts. Apparently it is for a 3 Axis machine, laser or spindle or servo. It has points for ISP but no pins in the holes. I think it comes with GRBL 0.9…
Does anyone have one of these that they are using, And how good is it?