Do not know if anyone have Brand 1.0. It very bad (painful, the sensor will create a dent in your skin) if you wear it for a long time. I bought it, wear it fo

Do not know if anyone have Brand 1.0. It very bad (painful, the sensor will create a dent in your skin) if you wear it for a long time. I bought it, wear it for 2 weeks and do not want to wear it anymore. So, The user experience is very bad. when I say the 'sensor' I mean the one in the back of the watch. (sorry for my wording. hard for me to express no technical things in English). Brand 2 still have it. So be cautious when you buy it. However good it is, if it does not feel comfortable. It is not good. I wonder if anyone wear brand 1 for more than one month. I did not.