I tried one of these when I was new to anal play. Since it's not tapered it wouldn't stay in unless held, and it was too long to hit any good spots when sitting on it. I even tried cutting a taper into the base with a knife but it didn't help much. Overall pretty crappy, though it may work better for G-stimulation.

Worked best as a g-spot stimulator. Did not perform well for anal play. It wouldn't stay put and the vibration bullet was hard to remove for cleaning. OK but wouldn't recommend it.