It's a bit oddly shaped, hard toy, but definitely worth for the price. Due to its shape, the nub sits (almost all the time) next to what I think is my prostate. Works great especially if you have a powerful external vibrator (like a magic wand). With that setup, you can achieve a hands free orgasm.
Otherwise, if not, still works great post-orgasm as it sits near the prostate, making contractions intense. Try keeping it in after, and you'll see what I mean.