I tried this plugin after WP Move failed.
I started the backup and got it to work even though you do not get a confirmation that it is done. I simply got a white screen on both firefox and chrome. I nevertheless saw a backup created so I proceeded with the import.
copy and pasting the URL is easy but after starting the import I only got.... a white screen. I hit reload and got the 5 minute wordpress install screen. good thing this was only a test...
I guess I will have to copy everything manually with FTP and phpmyadmin, the current plugins to move wordpress seem to be broken with 3.8.