I killed Dish to switch to Voom in December 2003, and have been happy with the switch. It seemed that Dish kept offering new customers all the breaks, and existing customers got nothing. When I decided to upgrade to HD and heard about Voom, it became a no-brainer, even with the $749 installation fee. Now Voom has come back to the early adopters and given us a $300 credit toward future billing, and I've had 'free' TV from December until Voom starts billing in April 2004.
I had Dish Network for 7 years before making the switch to Voom, and now that Voom has added a boatload of channels, I'm very satisfied.