We are sort new to the nylabones too. We are on our third.
This is the ONLY thing I can find Cooper won't eat/tear into pieces. I give one to her when she is in her crate so she has something to keep her occupied. She gets it everyday and it will last about a month. I was afraid to leave her with it when I wasn't home because I wasn't sure what she would do with it.
She has destoyed so many toys I never imagined she would be able to.
After a few days of supervision, I don't worry about it anymore.