I've a Linksys WRT32X which has OpenWrt on it. Overall I am impressed with the device and the firmware but there is one area of the house and garden that has terrible wifi signal whatever frequency I choose.
The distance is no more than 30 feet from the router and it is practically visible with doors open. Other areas of the house dont have this issue and I think it is because this area is the extension to the house and the insulation used has a foil on it.
Anyway doe sanyone use a wifi extender ot have any other tips to improve the signal in this area (the router cant be moved).