I really wanted to have a larger screen and I got it. Didn’t want to pay full price for a new one but got a good deal from eBay. I use it this watch mainly for running and sleep tracking. The watch works very well with my Stryd footpod in order to measure power levels and training methods for running. Although the series 3 was adequate especially with gps tracking, having a larger screen helped immensely when at speed in order to to check stats. I occasionally use this for sleep tracking to check if I’m recovering well after my runs which is vital as exercising. It would have been handy if the battery can last for more than a day but so far it’s working out well for my needs.