There are a lot of cheaper multi-function vibes so you might be tempted to choose something cheaper; don't! The Doc Johnson iVibe costs more, but of the half dozen multi-function vibes I've tried this is the one that gives the real thrills. It only has 5 settings (plus speed control) - Vibrate, Pulsate, Surge, Escalate, Roller Coaster - compared to some that have 8 or 9 settings, but the iVibe somehow feels more controlled and intense.. I guess you'll have to try it for yourself to see what I'm talking about.