None of the Surface Pro range has ever been either flimsy or plasticky. At the launch, Sinofsky put wheels on a Surface Pro and used it as a skateboard....
Yes, I've used all the Surface Pro keyboards. However, the keyboard is an optional accessory. You can use just about any USB or Bluetooth keyboard you like. You can probably get something industrial strength, if that's what you need....
However, I suspect we're talking at cross-purposes here. I don't know about the Surface Book keyboard. I watched the webcast but have not had a hands-on....
