Palm Treo 650 (CDMA)

currently have Nextel as my carrier but since the merger I am thinking of going back to Sprint. Before the service in my area was no that great (Baldwin Park, Ca) that was about 3 years ago. How is the service? Have there been any good changes to the service? Well if I do go back I have my eye on the Treo 650 Palmone that phone looks awesome. Can anyone tell me what they think of this phone what matters to me the most is reception and clear calls does Treo 650 offer that or is just a good looking phone. Thanks for the help!