Slide 4: DGVMs continued...
Unfortunately, they are very generalised (they have to be, to run everywhere in the world: for example, all savannas are in one category) so they are not very useful for providing advice to local land managers.
In general, the computational complexity means that they are very hard to use unless you happen to have a supercomputer handy. Furthermore, unlike GCM outputs, the results are not typically made available over the internet. In general, DVGMs are optimised for Northern temperate conditions, since the teams that run them are typically from these areas. The scale is inappropriate for conservation planning, and the equations are both extremely complex and unavailable for study and consideration by the end user.