here is a good thread on this i found:
http://www.yorkietalk.com/forums/gen...e-playpen.html
i have a playpen im going to use as well for the first bit when i get my baby home.
here is another good thread:
http://www.yorkietalk.com/forums/gen...e-playpen.html
both positive and negative
i think each dog is different. try it and see how it works for you. if it doesnt work out, find a different way.

im not an expert in anyway, i just read this forum a lot and have read many things about plapens, etc. Good and bad. I think its up to you in the long run.
cute pics in this post:
http://www.yorkietalk.com/forums/17039-post6.html