I use mine to put a wireless signal out connected to a TP link powerline adapter as my router wifi doesn't reach my room. Simply plugged the ethernet and power in then connected and it worked straight away. The signal range is perfectly acceptable considering the price and size of this thing so I'm pleased with it.
I really enjoyed this, having seen the film i was interested to read the book and certainly preferred it. However, i must say i preferred Ben Elton's "Blind Faith" which tells a story around similar ideas but in my opinion has a more real ending which says more than this book.