Further to GF and FE Hoppy's posts, the CitationJet 'plus' series has the same feature of VGP during an LNAV/VNAV approach with the altitude pre-select working in the same way as an ILS.
The whole aircraft probably costs the same as the stabiliser screw jack on the other type that I fly (744) but it has better displays and VNAV capabilities. I guess that's 20 years of progress for you.
I always teach guys to try and fly every instrument approach as much like an ILS as possible, so I'm firmly in the CDA camp (+50ft).