The dual rings actually keep everything in place, which I didn't expect to matter as much as it does. The memory function is a nice touch too, it picks up right where I left off instead of cycling through every setting again.
Michael U.★★★★★
The 12 vibration modes are honestly what sold me, and the memory function is a nice touch since it picks up right where I left off. The two elastic rings hold everything in place without pinching, which I didn't expect.
Stella★★★★☆
The dual ring setup actually stays put during use, which I didn't expect. Twelve vibration modes is plenty to find a rhythm that works, though the memory function only remembers the last setting, not your favorite. Solid buy overall.