Cardio okay, the rest is to be reviewed.

After 4 months of use between 1-3 times a week I am disappointed for several reasons:

Despite 5 calibrations on track, the distance displayed on the same trail route type is different according to the speed at which these courses are made, + 5% error.

This seems little, it is true, but a marathon is 2 to 3 km.

Ditto for the actual and average speeds.

Cardio is fine, but the shoulder belt is offensive in the chest during frequent or long use.

Although for small outputs 5-10 km 1 weekly for quality cardio and setting: mini and maxi with pulsations audible warning.
For beginners or for the resumption of physical activity.

I have not tested pool.