Fotodiox Lens Adapter (Sony A-mount to Nikon)

I was wondering if anyone in general has any experience with any of the fotodiox lens adapters?

I have been shooting the D800 for the past few months, but previously shot with the Sony A900...  I absolutely love both cameras.  I have a bunch of the Sony Zeiss lenses, which are awesome and wanted to know how they might fair on the D800 using an adapter?

Thanks in advance, much appreciated.

Mark