I used an Amazfit Pace before and the T-Rex Pro is much lighter. I’ve had this product for almost 2 months. The battery lasts an average of 2.5 weeks. I use 1.5 hours a day for training. And even with periodic heart monitoring the battery did not drain considerably. This monitoring feature and others can be configured through the ZEPP app. Cardiac monitoring and oximeter are accurate as I compared it to medical meters. Lots of workout options with good information during and after workouts. Among the numerous workout options, I found the high-intensity interval training (HIIT) run. It has support for the main languages ​​and no errors in Portuguese support. The ZEPP app leaves something to be desired, but I saw that the smartwatch is compatible with other apps. There are a few dozen faces in the Zepp store, but I haven’t tried many, as the original face already has all the information I need. The buttons are excellent and robust to the point of being more comfortable and agile to use them instead of touching the screen. I love it