I have had a lot of success with the BT Discs, they create a parallel wifi network (you plug one into your router and then others around the house, and you end up with a seamless, house wide network). They sell them in packs of two or three, and you can add up to five for full home coverage. They replaced my somewhat adhoc daisy chained system of wifi extenders, and have been for the year+ I have been using them now thoroughly reliable.
Huw Burford-Taylor ● 522d