It should not be bad if you got one of the newer models. In my place I only see a 1 bar drop and that is only if I hold it in a weird position. I also, receive about 7-8 other WiFi single that are at about 60% - 100% in my area. I also, tested it outside (About 2 stories and 240 feet away and I still got about 60% - 80% single) and was able to stream HD videos from Amazon without no interruptions...
As for the GPS, I never had any problems. Only used it couple times though.
Edited by Horse Head - 2/16/12 at 1:10pm