Had some trouble upgrading to this build. Wouldn't work as a normal update, so I restored my Windows 8.1 backup and used a manually created ISO of the new build to update. First thing to mention... if your start menu isn't loading as mine wasn't for a very long time.... wait a while. Windows is doing its app setup in the background, and once that's done you should be fine. Secondly, Microsoft is doing three (medium) columns of tiles per group in this build if its your first Windows 10 install (previous builds were four). 3 columns is absolutely terrible. With wide and large tiles taking up two of the three columns, it is impossible to get an aesthetically pleasing layout anymore. Finally, as I expected.... getting rid of that left column of apps in tablet mode IS an improvement. Having to tap on a small button to show all apps, and still have that all apps section take up only the column width? That's terrible. (And that's not even getting into how it now takes an extra tap from the last build because of the 'hamburger' menu button you have to tap to show the panel in the first place).