I've used 5 of these to network a 500 seat Victorian Theatre. We needed to network our rehearsal room, which is 3 floors down and complete opposite to the building from the office with the internet connection. The building is over 150 years old, and used to be an Iron Foundry, so there are very thick walls and plenty of iron in the building, however these did an excellent job. It took me about 2 hours to setup all of them, and we now have strong WiFi signal throughout the building (even though we didn't need this!)
The distance was just too far for cat5e cable, and with such thick stone and brick walls, even tacking cable down would have been a nightmare, let along running it through walls and public areas. These are an elegant solution, and with WiFi access on a commercial scale in this HUGE building at less than £250, we couldn't be more pleased.
Ease of use
Value for money