We bought this product to extend our WiFi as we could not get it at the front of our house or down by the river. We now have WiFi from at least two houses down in either direction. At any one time we can have up to 12 devices on and so far no lagging or buffering. The set up takes a little bit but well worth it. The peace of mind of being able to control who's on what is reassuring especially if you have young ones online. My only regret is that I had not come across this product earlier. Thanks Smiths City and thanks TP Link.