Yes, they are reliable. The shape and feel of her body is so sexy and exciting. Playing VR porn on a headset with headphones, it is so realistic. Having sex with the doll is also a workout, the feeling of intercourse and orgasm is so real and so much more satisfying than masturbation, by far! I highly recommend purchasing a full body heating system to gradually get her warmed up before the session. I have USB heating sticks, which are a nice addition if you have the time. But a full body heating system is a must, more so than a heating stick. Both are a heavenly treat.