MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I wondered about the size being a problem. I find many things here on Thingiverse have very small STL files, which is great for downloading, but means they've been generated with very low resolution... You end up seeing facets where there should be smooth curves. Thingiverse should update their software so it will show larger files. It doesn't affect the printing time, just the file size and slicing time.