I have been using Dapper for two months now and I have to say that they have nailed this release. It has been stable from the word go and Ubuntu has added some really nice improvements, I like the new version of Gnome, power management has been improved and the networking has been much easier as well. I am going to be moving a production server to this build within the next couple of days, so we will see if the stability continues on the server, That will be running several things that the notebook is not and will also not be seeing the reboots that a notebook does as it is being transported.