After a few teething problems - including it taking five minutes to figure out how to get batteries into the remote! - we finally realised that the 40EX503's operating system is really rather good.
The number of key features, such as Internet Video, that have dedicated buttons on the remote for immediate access is impressive, and the PS3 XMB-style double-axis on-screen menu approach works well once you're used to it.
The electronic programme guide for finding stuff on the Freeview platform is nice too, combining lots of clearly presented information with a sensible navigation system and a small picture of the channel you're currently watching playing in the top-left corner.
We should add for the record, too, that the new remote control design feels more comfortable in the hand than the old skinnier Sony design, as well as making buttons easier to pick out.