I just got my disc today. Seems to work great. But I have a roku box which is able to show the HD content in 720P so I really have no use for This disc right Now. But i really like to see netflix being proactive about getting their instant viewing content on televisions.
Yes it can be used wirelessly. That's how my setup works. As far as the wireless networks strength, do you mean available bandwidth on the wireless network? Yeah it would lower available bandwidth, but most likely any G or N network would be faster than your broadband connection anyway, so your concern should be more about how much it will bog down your home Internet service. I use my roku box and stream HD Netflix all the time while using sometimes using two other computers all on the same wireless network and have no problems on my 15 down/2 up connection.