I don't think any of us are.I'm not a fan of the NEC. It'll take more than some new cladding to change my opinion.
The new cladding is much neater, it has to be said, but it would be hard not to be. Though frankly, I can't think of an attractive conference/exhibiton centre, even the big ones in London are ugly.
Just blessed ours is out by the airport and is ugly, rather than in the city.