Some legitimate question has been raised about ABS fumes and the Cube.
This is not a definitive answer. But, it's the one that counts for me.
I did not mention a thing about smell or irritation to my family as I set up the Cube in my daughter's home. I wanted to see what my family would say without any influence from me.
The Cube printed for well over 8 hours and not one of my family mentioned anything at all about any smell or fumes.
After we left for home, I directly asked my wife if she noticed any smell. And, her answer was, "No."
I can't speak for everyone. But, I do know that my wife and daughter have what I would consider very sensitive senses of smell. If there was even a HINT of something obnoxious they would have noticed it.
It passed the test that counts for me. And, while I know that is a completely subjective observation, it's the only measure that I can offer.
I hopes this helps those that might be concerned. :)