Got this for my husband for his birthday and he really likes it. I have one of the female snail vibes and just love that constant external vibe and figured he would like to have the sides of his shaft and head with a continuous vibration as he strokes with it or if I use on him for foreplay. He is blessed and with the amount it uncurls he is able to have vibration on his tip and also at the base! We both highly recommend Evo and Snail Vibe for solo play or playing with your partner!