... Only a matter of time, unfortunately,

Can only confirm what users wgjue reported. The partial rolls after a short time (1 month) no longer completely a, denied the retractor. Therefore, initially quite usable but after a short time the total bad investment. The retractable cord is prone to error, what you realize after a few rain showers, if any mechanical parts start in Aufrollkasten to rust. Now after 4 months is obviously the lifetime expired :( I will not buy the part again, but look around for an alternative.

The whole is all the more annoying, as extra charges by the Assembly: The screws for wall mounting are sold separately! And it had to be poured in with a sufficiently stable concrete base, which carries the terminal fixture. In total, at me so about 30 - 40 EUR + a not inconsiderable amount of time together. That makes me really pissed.

Edit 05.05.2013:
(I set up a matching photo ....)

Start to the year - the part has completely given up the ghost, it no longer runs on, no cm.
I disassembled the part, which is not without risk due to the large inner spring.
The problem is with the bolt of the lower turning mechanism. This rust merrily to himself. And even though he's in a plastic version, it extends through the oxidation so far out that turning the parts can no longer take place. And, although the tension spring has enormous powers.
SCRAP :(