Simply fantastic!
I tried myself the new train to Valencia. I'll tell you my experiences.
I bought two return tickets on the web, in advance of course, one for the Christmas weekend and the other one for the New Year's Eve weekend. I paid 63.90 euros for each return ticket.
The trains are completely new. What a wonderful feeling is to travel in a brand new coach, it's like when you drive for a first time your new car, the smell, the feeling. It's so clean and comfortable, seats are a bit bigger than the ones in an ordinary train.
The train left on time. It cannot reach a high speed for the first 60 or 70km. until it is away from Madrid, then it reaches 290-300km per hour (you can see it on a panel).
Is beautyful crossing the world biggest wineyards of La Mancha, while having a cup of coffee at bar coach. Then landscapes change into pine forests as whe aproach the UNESCO world heritage city of Cuenca, what a pity, we cannot see the city from the train. In a few minutes we crossed the Contreras reservoir, wow! it looks so small from here. After a few tunnels we pass near the dof Utiel-Requena, minutes later they anounce Valencia staion. Only one hour and thirty two minute after leaving Madrid.
They have built a new temporary railway station 500 yards away from the beautyful art decó stile
Valencia main station , built in 1906. Thre is shutle bus conecting the two stations.
There is a proyect to expand the old station, as they did in Madrid Atocha, but for the moment is has to wait the economic crisis ends.