I highly recommend reading the reviews on the vibrating bullet toys to see if it works for you. In case you didn't know, in order to access reviews, you need to go to the product page and scroll to the middle. Considering that you're looking for Tantus toys, they'll all have plenty of reviews to choose from. Hope this helps!
I don't really prefer the bullets myself, I'm just not that much of a vibrations gal.
One thing you'll want to pay attention to, as you go through the reviews like Ms. Spice suggested, is that Tantus recently upgraded the bullets they include. Their vibrating toys used to come with a standard watch battery bullet, but now they all come with a nicer, N-battery bullet. If you want to learn about the newer bullets, I think the Little Secrets line (like the Spoon) have only ever come with the nicer newer ones, so check out reviews for those and just know that you'll get that better bullet with any purchase now.