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.
I'm hitting about 12K a day per week (I don't know of that makes sense). Some days less, some days more, but a week's worth of walking for me is about ~12K steps per day. I am a very boring man who just reads comics, plays video games, and hits the gym. My gym is within walking distance, and my library (where I get my comics) is as well.