Out of the box. I initially wanted to set up the TV through Wifi. However, it was dropping connection every several minutes. I became fed up and moved my cable modem near the TV and plugged in the ethernet cable.
The tv was also freezing and rebooting unexpectedly.
I eventually had to call Samsung Customer Service and they were great over the phone. The repair team came once just to verify the issue and assigned another appointment. The TV eventually updated its firmware and the symptoms stopped. I can now watch tv over WI-Fi and the tv doesn't freeze any more.
The only CON, that I can think of is that Samsung doesn't or hadn't thoroughly tested the firmware before releasing it.
The last tv I purchased 8 years ago was a Samsung and it was the best tv I have ever owned. When it was time to retire that set for a bigger upgraded version I had no thoughts of purchasing any other brand. This 55 inch tv is a dream come true. Picture is beautiful, the design is sleek, sound quality is clear, and the smart features are alot of fun. All around it is a great product!