Very please with this phone. Now I feel much more professional on the phone...I set up a SIP account at Skype. Then after about 5 mins of configuration I have the phone up and running. I found the setup instructions on this page very useful. http://www.3cx.com/sip-phones/cisco-spa501g/

The phone is similar to the 504 but is gigabit ready.

Works Great

Not much flexibility in the settings