In the urban area and at low speeds a top speakerphone, on motorways and at höhreren speeds but absolutely useless. On one hand, the other party has difficulty understanding the other hand, the quality of the speakers of the FSE is rather poor, so that here prevails a very miserable voice quality. The extendable Micro improves the quality a little. In my case, the micro was hoisted along the door seal and mounted near the driver's head, so that tiresome threading and unthreading of the microphone does not apply to every call.
The mount itself is very easy to handle, can be vertically or horizontally mounted. Use Because of flexible drawer for many smartphones.
On the whole, a valuable speakerphone and cell phone holder, due to the rather weak voice quality but only recommended for city driving.
tested with HTC Desire