When travelling with the kids, the fridge, the satnav etc all running, we used to have to alternate plugging things in to our twin sockets (one in the front and one in the rear).
I looked at quite a few of these gizmos online and this one seemed to get the best ratings.
Having tried it with various things plugged in, I have to say I am impressed.
The cable is average length - probably enough to get from the lighter plug to level with the back of the front seats. This is a hub, so ought to reach to the middle of the serviced area. It does, so I cannot complain.
There is a self adhesive mount if you really wanted to, but I am not sure I would want it on show all the time due to security issues.
What really pleased me was the unit didn't seem to heat up too much in use, and the construction of the unit is pretty solid.
Good value for money and the supplier delivery was snappy. Other online offerings had poorer reviews and were more expensive.