I've done dozens and rarely does it help.
A range extender is less than a new wifi router and much more predictable that it will help.
Am using a Linksys 802.11b router and 2 usb adapters. The signal is "low" in remote areas. Will buying a new router (802.11g) give me a stronger signal? Ive seen where the router prices are cheaper than antenna extenders and speedboosters.
If answer to the above is yes, what is the current best router pick? Im leery of LinkSys.