When unpacking only once a fright: the thing is huge! How do you handle it? In practice, this is wonderful barstens! Fits comfortably in your hand, ever makes no problems. Even the inevitable volume of the device I find absolutely fine and in no way disturbing. Its effect is huge! We used to have a no-name unit with only 1 Massagkopf. This double head is much better. You really need only the spine go, nice and slow, and the decisive games will be massaged. The success is better than expected. The heat function worthy of its name. Takes about 1-2 minutes, until the heads are really warm, but you can feel then, and it feels good. Can you turn off the rest, if not desirable. We have the vibration speed are always on maximum. Slower we perceive as less pleasant / helpful. But that may be individually different.