Something that is not well advertised in the description is the fact that the entrance is slightly smaller than the rest which creates an incredible 'suction' feeling which, in my opinion is the best feature of this device! The vibration intensity is good and adjustable to your preference. Build quality is good and the device is easy to recharge and clean which is important. The heating could have been a little more evenly distributed and the device been a little longer but overall, this product is worth it. The price on 3xtoys was much better than I found elsewhere. My first purchase with this site but I will be back.