Ideal if you're willing to compromise

The mirror is robust, the flexible style also. The attachment is simple (just a few minutes). I use it on the e-bike, left, where is the "circuit" for the engine. Therefore, the mirror is not ideal far left out, but is due to the flexibility of the neck and stability of its durability yet quite far deflected. Have "on hand" and "down through" attempts. The two go. Is almost taste Zache (or appearance).
The compromise: the review of the mirror image must be trained. The mirror is convex (curved) which gives a good all-round picture; for now. But !!!!! Vehicles approaching long remain small to tiny (sometimes invisible depending on the angle). Shortly behind them are reasonably well visible. For general review ("what's all behind me going") tend not to use, the typical left-hand turn in the city-road (where it is indeed the most critical), but a pleasant help. But does not replace the "listening" to the back to see if there was "ranrauscht".
Nevertheless, I feel safer with the part; as I said, after some practice, you can rely a good mood.
Especially for older people, who often find it difficult to turn the neck like a rubber doll back, a clear recommendation. Especially since the price of the stable thing absolutely is okay.