I LOVE bondage. I sleep in my wrist and ankle cuffs occasionally. But, I never sleep bound or restricted in anyway. It just isn't safe. You could sleep for hours on a limb that has been 'asleep' and cause damage. The furthest I think I'd take any type of bondage if he wasn't home, is a body harness or crotch rope of some kind. And even then, I'd have clarified the rules before hand that if something became too uncomfortable I could remove it. I don't mean, I just don't like it, I mean painful chafing or something that would cause damage.
If I had a limb or something go to sleep while playing or just in bondage and I didn't tell my Master right away, he'd be beyond disappointed in me. He trusts me fully to always communicate that with him. He can't read my mind or know exactly how I feel physically. He expects me to tell him. If something he did made me feel poorly emotionally and I didn't tell him straight away... we've had this situation and he was very hurt. I won't do that to him again.