Suitably good!

The Rollei arm extension is an accessory for all cameras with 1/4 "thread. The processing of the arm extension is very high. The mechanism is surprisingly good, but very shaky when the individual parts are open. The wrist strap slips, the rod not from. The bracket for the camera can be rotated 90 °. If the holder of the screw is loose, you can turn the thread above, when the screw is tightened sits the camera firmly and the individual extended segments also. Included is a snap hook for attaching . On the arm extension is a guide available that describes how to open the bar.
The use at a concert provides beautiful photos without rear heads, also provides the arm extension, the possibility of shared photos on vacation.
Misappropriated the arm extension would also be a good time wagering against burglars :)

CONCLUSION: Earmarked a good investment.