I just received this Omoton cover and it fits well. Snug but not real tight. Cover closes completely with no gaps. No dust will get in with it closed. Cut outs for the power button, USB and reset button. Opening cover does wake the device up.
Cover is quite thin so I wouldn't place it in precarious locations and keep it away from hammers and other heavy objects.
http://smile.amazon.com/gp/product/B...ilpage_o00_s00