I am giving this four stars strictly, because the bullets stopped working after five months and I did not use it too often. That being said these are powerful and I have only realized how powerful after buying a few other bullets, massagers, and vibrating dildos, etc. This is a favorite and I will definitely buy it again. I do not have a issue with how many batteries it takes I bought rechargeable ones. The con being that they need to figure out a way to make the bullets last longer. When they stopped working they made an obnoxious screeching sound, which is embarrassing when you have roommates..