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.
Walking (or biking) to get around town is the most underrated fitness trick. Walk to and from work and you can get 10k steps in without much time or financial cost, mentally feels good, and gets you noticeably fitter.