Ok, just installed the latest AirPort extreme base station...in a PC, xp. Had a Lynksis n router before, so this should be an upgrade. Got it installed, just use the step by step guide, choose passwords etc. Works fine..but, speed is terriable. On the iphone 4 i get between 9-50 kbps tops. If i use the "guest" network i set up i get 50-100 kpbs. In fact it is so slow that the www.4g-speed.info times out half the time and just gives up trying to measure. On the old router, exact same location i got 150-200 kbps. I am not computer savy, so i dont know how to diagnose..any help woul be apreciated. Thanks