What is the best calorie counter/armband?

Hey guys I was looking up different calorie counter/armbands/pedomoters (Not sure what to call them) and I wanted to know if anyone here has one. I am thinking about getting one and I have looked at the Bodybugg, The Body Fit Media (Jillian Michaels), The Fitbit Ultra, and the Biggest Loser Slim coach. Can you tell me your likes/ dislikes, is it worth it? (Some have a required online subsrciption.) Do you think it is accurate? and stuff like that. Any info will help. Thanks