2. More or less. It is a sort of router that receives the wireless signals and then is connected through the devices via an ethernet cable. It is like using a different device for a wireless antenna instead of using the built-in wireless antennae.
you could do this with your laptop, since it can connect fine it should be a plausible workaround, temporary or not.
edit: simply put, why purchase anything at all when theres free options around.
What on earth are you talking about? You might want to go back and read what he said again, you've obviously misunderstood something. A laptop is in no way, shape, or form, a viable alternative to a wireless bridge.
Also, while we're here, I meant to comment on this when you first said it - radio waves go in a straight line and they bounce. They do not magically curve to go round corners, so there's no way his wifi will go out of the window, then bend round and go back in through the upstairs window. It will either go through the ceiling, or it will bounce off something outside, if something's there.
Also, using two repeaters obviously won't reduce bandwidth any further than using one. Since the reason they halve bandwidth is because they use half to receive a signal and the other half to forward it on, the bandwidth available will be whatever that results in (eg. a 150mb N AP in repeater mode would have 75mb of bandwidth available for a connection; if you used two in sequence, bandwidth would still be 75mb). Latency will be increased even further though, it's true.