The Form 4 is one of the best Jimmyjane toys that I've tried. The simplistic design works really well for external stimulation, and once you get used to them, the buttons on the base of the toy control the vibrator really nicely. Plus, it looks beautiful, and the fact that it can switch its base with other Form toys is great. I feel it's a bit overpriced for what it can do, but if you don't require earth-shattering vibrations, it's a good vibrator.