Calorie counting arm bands- Do they work?

MeccaLoves2Sleep

24-Hour Fitness has these armbands on sale. I guess they track calories burned with a supposed 90% accuracy rate and you log food like you do with MFP (you have to pay for it- so could still use MFP but calories burned would be more exact???).

Anyone have one? Worth the investment????

RainbootsToBikinis

I've had mine for 2 days so far and I absolutely love it. Their system for logging food sucks so I track my food on MFP still but love it for seeing my calories burned.

MeccaLoves2Sleep

Thanks! That helps! I guess I'll shell out the cash-ola!