I have been using the PLA401's for about 14 months, courtesy of a hot deal here towards the end of 2008, but I had been having problems with dropping connection. Their Technical dept were very helpful and after upgrading the firmware 2 were ok but 2 needed to be returned as faulty. They have been replaced with PLA401 Version 3's which are much smaller and work perfectly. Well done Zyxel for good service and for having a 2 year no quibble warranty. I post this in case others have any problems.