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.
Just moving is great. I think walking (or equivalent) I good amount everyday is more important than any other point of fitness. Lifting is great, and getting at least 10 minutes of raised heartrate (cardio) is also very important.
But time, energy, and attention are limited, and if you have to pick one thing to try to do everyday, walking a few miles would 100% be what I'd recommend. I don't have a problem with weight, but I do have one with blood pressure and cholesterol (despite and home cooking; genetics is a bitch), and making myself walk or bike for at least a half hour everyday has helped my blood pressure a lot.