It can be time consuming due to the sheer length and duration, but I have found fat falling off in the places I have most issues (lower abdomen, chest, and back). It's free, it's super chill, and I have found it clearing my mind too. In combination with more intense regime, I think it is a a necessary supplemental exercise. I think walking outside is probably better (it feels more natural to me at least), but just a plain ol' treadmill or other cardio machine will probably get those steps up. Its super low-impact, easy, and do-able.
I'm dropping weight and I'm finding my brain rebooting in some places as well. It's overall super great and I encourage every Hexbear to increase their step count.
When I was in college in Arizona I was able to walk around in the horrid summer heat pretty damn well. The first few times were hell and especially because I hadn't gotten the hydration part down. Eventually I acclimitized, got used to just stopping at circle k to top up my drink for like 60 cents and walking 12 miles one direction because Phoenix is designed for cars and fuck you if you dare try to walk. Getting a bike was amazing though. Nice large flat areas to pick up speed and still with 12 mile trips one way, but it took 2 hours, not all day.