I have had my Enduro 3 for two months now after upgrading from a Fenix 6. As far as battery life, I am down to 25% after 16 days and 11 activities totaling 104 miles of running almost all of which were before sunrise so little help from solar. That seems pretty good to me. Definitely some bugs still remaining especially with navigation and PacePro. Also, I don't think the Auto Rest feature in the Ultra Run activity is working properly. ClimbPro seems to have some issues also - confusing ascents and descents sometimes. As long as these are fixed within a few months I am satisfied. I have a 50 mile race coming up in December so that will be a better test. Overall a nice upgrade from the Fenix 6. On the navigation, on one long run I was feeling unwell and I used the "back to start" feature and that did successfully provide a shorter but convoluted route back to my vehicle so that seemed to work.