Instruct: Classify the given review as either positive or negative.
Query: Beware of firmware updates

I had (emphasis on had) a befw11s4 ver. 2 router. In an attempt to remedy some strange VPN problems, I tried upgrading to the 1.43.3 firmware. BIG MISTAKE. The update program lost connectivity with the router during the flashing process, resulting in a dead router. I even managed to duplicate this activity on another router just to make sure it wasn't a fluke. A call to their tech support confirmed that this is a problem other users are experiencing, yet the faulty firmware is still available for download. If it works out of the box for you, great. But be careful if you decide to update the firmware.