Programming tool works great. I haven't really used every setting available, of which there are many, but the ability to reverse rotation of the motor through the software is a real plus. Don't have to worry about what motor wire goes where, just fix it afterwards. It took some digging to find the software for it, but for those of you still looking, it's in the "Files" tab of the Favourite Sky 3 4x12a controller in the International WarehouseThis device is useless without the software. The software is conspicuously absent from both Hobby King's and the manufacturers website. No software is included and there are no instructions in the package.Does what it is supposed to do and price is low enough to justify having in your tool box.A must buy to everyone who has a Favourite ESC, without it you are unable to program and upgrade the ESCEs muy bueno para acceder al programa de los speeds quatro, ya no tengo que cambiar los cables del motor cuando uno gira en sentido contrarioWorks exactly as it should. plug it in plug lipo in and the program lights up green. don't need to bend the plus pin out of the way either like the afro USB.