Advantages and at the same time small drawback is the Parental Control. The holes are covered by plastic so that some force is necessary to insert the connector plug. Once plugged in, the plug is so firmly fixed that it is rausholbar only by a jerk again. When vacuuming, the annoying little because I always prefer the whole plug from the socket (the bottom is still a lamp plugged in and the cleaner comes in the middle).
If I have a single outlet, I would buy the plug again. It is cheap and of high quality.
For a power strip, or 2 sockets above the other but this plug is unsuitable.