Currently I have M105 (old version) and Powergloss. I'm not sure if I'm a fan of 105, I don't know if it's because it's the old version or what, but it's just very dry. I feel like there's no working time and I'm hurting the surface more than helping. I haven't tried Powergloss yet so I'm not sure if it's better. What are you guys using? Oh by the way, this is with wool and a rotary. Thanks for your input!