Polar F6 great for exercise

I bought Polar F6 almost 2 months ago. I wanted to increase my exercise intensity but not to over exercise. This devise changed my training. Now I exercise more intensively and feel great. I use the wireless connectivity that F6 has to copy exercises data to Polar site. It helps me to review my progress and plan next step and... to be proud of myself that I make this progress. I lost about 14 lb weight (I have few more pounds to lose). I am not sure if I need more advance model for my need. I do weight resistance training - F6 is great I rest only as long as I need to reduce my heart rate. I do different types of cardiovascular training (bike, elliptic, treadmill). F6 communicates with treadmill and I can see my heart rate on the treadmill's control panel.