We have a Comcast (linksys) WCG 200 Modem/Router. We live in a townhouse with many internal walls and three levels, and the wireless signal does not transmit from the lower level where the modem is located to the upper levels. We were looking at the WiFi 750mw booster amplifier. Do you have any experience using it with the Linksys WCG 200 and has it extended the signal from floor to floor? Thanks.