I haven't seen anyone else mention the variation in bamboo tint relative to the face of the phone so I can't speak to that. The bamboo back can be considered slippery for sure but, at the same time, I find it to work well with the natural skin oils, especially if you're in moderately humid environment or have some cause to have slightly moist (but not quite sweaty) hands. I'm able to cradle the phone at pretty extreme angles without having to grip it. So if I late it across my fingers and then tilt my hand, I can usually get it to at least a 75-degree angle before it wants to slip away from my fingers due to gravity. Plus, there's always the dimple to be used to that little extra confidence of grip.