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 use PETG for parts that need the strength. I haven't had any issues like you described with the ones I have printed (and I printed a lot getting it designed). I think I saw that you had it sent out to be printed? Do you know the settings that were used and what material it was printed in?
Where are you located at?