Well, i bough it long time ago, i never used it, because i used Padstarr, but it seems to be not working with this device and because you can use Gamepad and mouse together.. and after switch is setting lost.. its use would be awkard at the best.
Can you confirm that with Controller companion you can use L2/R2 in mouse mode? Because that is whole problem, that their presses arent detected at all in mouse mode, without additional utility..