Timex Women's Ironman HRM

Hi guys,
I got a GREAT deal on Timex Women's Ironman Road Trainer Digital Heart Rate Monitor (T5K723L3) due to a black friday sale, and it should be arriving in a couple days! I was talked into buying one, as I have been "guessing" on my calories burned and feel a more accurate number will help me achieve my results faster. Anyone own this model? Do you find the calorie count accurate? I have read many that many models and brands are not as accurate as they are thought to be, this is rather discouraging if this is the case. Any feedback?

Thank-you,
Sheila