these were my first ones, and i didnt find them very stimulating personally.they grow uncomfortable if you wear them longer than like an hour, and instantly if you sit down. at one point the discomfort turned into sharp pain and i had to rush to the bathroom to get it out, even though i was in the middle of something.overall good manufacturing. pretty easy to clean, i just wash them with soap and water then spray them down with alcohol before and after i use them.i probably won't be using these very often lol. maybe i'll get something longer, or something that vibrates. who knows :P