I have a T6c and have been using Suunto since 2004 in combination with Firstbeat Athlete. The product works for about 4 months (when used 3-4 times a week), then the error rate increases dramatically (seals around the sensors break) until it becomes unusable in the 5th month. This is the 5th belt I've bought in 2 years, the old belt lasted 3 years with no problems. In fact, Suunto, more is expected of you. If Suunto doesn't change their design before I have to buy a new one, I will definitely switch to Polar.
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