I find it interesting at how my body reacts. Each session with these products produces different results. I have had days that I have really looked forward to using my Anero products but with less than spectacular results. My body just wasn't into it or maybe my mind wasn't. Well last night I didn't feel that excited and I had a somewhat stressful day but I decided to go for it. All I can say was it was the most intense session I have ever had. Go figure!! Each model sent me through the roof with almost nonstop orgasms. What wonderful products you have created!! I highly recommend using several different models during each session as each one hits different spots. I have also found that taking a break between switching models helps too. Is one model better than the other??? It depends on the session.