The Satisfyer Wand-erwoman vibe is extraordinary in terms of speed and power. It is stronger than the Hitachi and superior in every way! I love the fact that it is waterproof. I mostly use it in the shower or in the tub. I have tested the ability to fully submerse it and I have had no problems. Sometimes powerful handhelds can vibrate too strongly in the palm of your hand and cause itchiness or mild aggravations but I do not have that problem with this vibe. When I'm in the shower or in my bed, I like to use Sliquid Sassy waterproof lubricant to make it glide over my clitoris with ease. With over 50 Vibration Combinations, I always find a new speed or rhythm that fits my mood. Sometimes I like it slow and other times I need it fast and quick. Either way it always hits the spot. The only downside is that it can be very loud. It's not as quiet as I would prefer it to be. To combat this, I usually play a favorite record, or turn on some porn. It makes the experience even more pleasurable. The battery life is phenomenal as well. I have been using this vibe for 3 months and I haven't had to charge it yet. I hope that you find this review helpful. If you have any additional questions about this vibe you may click on the product page and ask them there.