The rolling metal ball inside is what sold me — you actually feel it moving as you walk around, which makes the whole thing less of a chore. I've been using it for a few weeks now and can definitely tell the difference.
Ella★★★★★
The rotating metal ball inside gives a more noticeable workout than the plain weighted ones I had before. I wear it during my morning chores and can actually feel the pelvic floor muscles engaging.
Henry★★★★★
I've been using it for about three weeks and the rotating metal ball inside gives a noticeable rolling sensation that makes the exercises feel less like a chore. It's definitely for someone who's already comfortable with pelvic floor training, not a beginner.