HI,
Just got S3D and it prints very well.
I decided to create a build platform model for my Printrbot Simple Metal. Everything would be OK if not for one problem - the settings in Tools > Options menu are not saved. Once I click OK I can see the model but exiting the S3D or changing anything in the Process settings resets it back. I don't think this is a correct behavior.
You can find my model here: http://www.thingiverse.com/thing:941680