Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent HRM and stop watch - pc link is ok but should be updated to USB

This is an excellent heart rate monitor with the standard features (max, min alarms, time in and out of zone etc...) its also an excellent stop watch. I download the data using Suunto's Activity Monitor software - which allows you to export the data to Excel! Plotting HR versus altitude is very useful for training.I only have a few minor complaints: (1) Battery life is terrible - this thing (and the chest strap) eat up 4 batteries a year. (2) When battery life starts to fade interference is a big issue - fortunately the data can be edited so you can remove "spikes". (3) PC interface is serial cable - should be USB. (4) Suunto software is veru buggy and crashes all the time (no data lost fortunately)