Great box, this one. I toyed with the idea of Sky+, but decided Freeview was fine for me. Went with the EX78 after reading a number of reviews comparing it with other Pannies around the same price - and, for the price, this one was great. I've a Panny TV so it seemed a natural choice. It works seamlessly with it - the Viera link works great.
The only reservation I've got about it is the advert that appears by the TV guide. It's unobtrusive, but really it's a case of 'what right have you got to advertise, given that I've bought your product'? I guess it's the quid pro quo of the free EPG.
Barring that, an excellent product, easy to use and works a treat.