All I can say is it does get better. Sophie is almost a year old now and only once in a great while goes after one particular chair leg. I gave her nylabones too and when she goes after the chair I still replace the chair with a bone. Be careful to replace the bone if it looks too worn so Chloe won't swallow any of it that might break off. I've heard of that happening although Sophie is not a hard chewer and I have never experienced it. As far as the hand bitting...Sophie stopped doing that after a couple of months. We just moved our hands away, told her no, and replaced them with a appropriate chew toy. She still will play at mouthing our hands a little but never bites down, just play growls and mouths a little.
