My D-Link DIR-655 that I have used for a few years is starting to have some issues disconnecting and dropping WiFi. So last night I went to the local Best Buy and decided to try out the $179 Airport Extreme router (latest model MD031LL/A). Seemed pretty easy to set up from my 2011 MacBook Air using that Airport Utility. Definitely a lot less settings and options than the previous router, but seemed to do allright. Excellent connections and speed to our laptops in the house. One issue I am having though is that I cannot get either of my 4th gen iPod Touch devices nor our iPhone 4's to work with this router. On each, I even set up new network connections on the devices and got it to see the network, but when I open Safari or anything else for web access (App Store, email, etc.), nothing happens. Is there some special trick I'm missing for these handhelds? Also, when I wake them from sleep or completely reboot them, it takes a really long time for them to see the network (if they do at all). I did not have this issue ever with the DIR-655. One other question...I've never used dual-band before. Is there a noticeable difference when connecting to my 2011 MacBook Air to use the 5 GHz band instead of the standard 2.4 GHz band? Thanks in advance for your replies!