How good is the D800 ?

I have a Nikon D3s for the speedy stuff and im very very pleased with it  .

I would like a D800 for the "not so speedy stuff " This will be mainly landscapes , models and so on .

On on sites the D800 is praised to the heavens and on DPR its all whinning and misery .

Somebody please give me and honest opinion Please !

Mvh Clouseau