After one year of usage the router starts to have problems. First it drops DSL connection. Then it only works for one pc with static IP and 10Mb after 2 hour conversation with their tech supporter. Then their supporter suggests me to upgrade firmware. Their tech supporter emailed me the firmware, but it can't be loaded to the router. Then the diag light starts to flash which indicates an unrecoverable software problem. Then they tell me the router is dead and if it's over 1 year warranty I will have to buy a better one.According to their tech supporter the firmware can be corrupted. After the corruption there's no reliable way to recover from it because firmware upgrade may not work anymore. I am not sure how their firmware (not hardware) can run into problem and why they don't have a good solution. By the end this is not a hardware problem. How come a software problem can be unrecoverable.So be prepared to run into problem.