Almost perfect but slightly disappointing
The rings are pretty thick and sturdy.  It's a great fit for my hand.  However, unlike some other "large" Möbii I purchased, there isn't enough room to slip a single finger through a single ring to keep it from falling out of my hand.  The thicker rings leave a lot less space in the middle of each ring.  I figured XL would have more space inside each ring, not less.
Rating: 4 stars