He was fantastic last year too, but this year he improved a lot. Under Moyes' team he improved his strength and his cross catching ability, but this year he's taken all parts of his game to another level, his GK technique and positioning is world class, I don't think he would have made yesterday's save last year.
I think a lot of credit goes to Hoek and the other coaches for his fantastic improvements, at this time he is as good as anyone out there and he's only 24, if he keeps this up he will go down as one of the best GK ever.
Also he is the player that made the difference this year, take him out of the team and I don't think we would finish in the top 4. Look at his save yesterday, it's not much about the 3 points, but about the situation, without it we would almost certainly lose our 4th in a row, the effect on our team's morale would have been disastrous.
He's our best and our most important player and nobody even comes close, it's a shame that he will most likely leave in the summer. Will be gutted when that happens.