Especially for garage and parking lots and especially for backing i strongly prefer it be similar to ice with automatic and could be as one custom setting. Brake, put in reverse, and now by means of release the pressure on the brake pedal regulate speed. You get much better resolution this way as compared to accelerator pedal. Also, if you think you cant make it, the foot is already on brake pedal and you can stop fast. I tried the settings Holl, Roll, and Creep, but didnt work well. For Creep i touched the accelerater momentarily and the car was backing fairly fast and got several feet before i could react with the brake pedal. My safest method is to do short on/off with accelerator. This is tedious.