I just got my brand-spanking new Airport Extreme 5 and am pretty happy with it. It was loaded with 7.5.2 firmware to begin with (which I read a lot of people had issues with.) I only had it for a day, but during the middle of the day - I started having the router randomly restart on me twice - dropping the wireless signal entirely. I finally did a manual reboot and power-cycle on the cable-modem - now it's stable and haven't dropped wifi-since (knock-on-wood.) I am concerned though (being this is a brand-new product) whether this is just a regular symptom that this router exhibits sometimes or have I gotten a defective-unit?