The Titanium X spec is very nice, especially if you are talking brand new as it's the face lift version which is even better.
I have found the lower specced models to be somewhat ...less great than I was lead to believe they were though. Don't get me wrong, they are all good, but fairly recently I was looking at a couple of Zetec and Ghia specced cars and while they were 'fine' ...they were not quite as good as I was expecting on the inside (actually I was quite disappointed) in the end I bought a Volvo V50 (smaller I know), which was rather better I found, I don't think it drives any better but it has a better interior and really just feels like a higher quality product.
I must say the face-lifted Mondeo has a much better centre console now ...the mass of cheap silver plastic in the pre-facelifted model was a big put off for me. The Titanium X though has a darker shade, more of a gunmetal sort of colour which looks much better.
They are very good cars, I find it hard to really say anything particularly bad about them. I was posied to buy a 2007 MK4 some weeks back ...albeit Zetec spec rather than Titanium X. But then I saw the Volvo and had a look and it, went for a drive and liked it better. A decision I do not regret.