Most of the searches pointed to that Mountune springs are made by Eibach, but also to Mountune's specification. I just installed mine yesterday, and like them quite a lot. The ride also does feel less bumpy, but I'd like to spend more time with the car to confirm that. It also has very minimal drop, so I don't have to change my daily driving habit. I also have 15mm Garage Line adaptors. No rub whatsoever.
Good luck with your purchase!