I have had great experience with Suunto products over many years so I decided to go with Suunto when I found out that I needed a heart monitor. I ignored the user reviews on the Suunto site that warned about clasp connection/communication problems on the comfort belt. I almost immediately discovered that communication from the belt to the watch would come and go without warning. Jiggling the clasp frequently restored communication. I purchased a new belt directly from Suunto and the original belt is going back in for repair/replacement. The problem seems to be that the clasps contain contacts that activate the belt. The clasps turn the belt on and off. If either clasp(right or left) has any wobble in it at all then you are likely going to have problems. The ânewâ belt looks the same but seems to have better tolerances in the clasp connection. Otherwise, everything else is great. I am especially impressed with the software and my cardiologist was quite impressed with the reports. I wear the device for 8-10 hours per day and have had no comfort issues. Electrode jell is cheap and a good way to insure contact for many hours.