After looking through Google's own material design guidelines (http://www.google.com/design/spec/material-design/introducti...), I find them much more pleasing than this bootstrap theme. When it comes to material design, it seems that context and execution details will play a big role in delivering an experience that looks and feels right.
My project is just a 1:1 conversion from Polymer Paper project to Bootstrap. It's still in early developement but I'm sure it will become much better in future :)
