At the x-plane.org forums, the author indicates this model may have some limitations in terms of realism and systems, especially because he is not a coder. He won't develop the G500H, for example, but he's hoping he might somewhat use X-Plane's default G1000 somehow.
Several variants, such as medical and law enforcement, are planned and Brandon is open to listen to the community's ideas as well.
The model seems to be quite advanced and textures are now being added. Hopefully, further down the road, perhaps we can have other community members pitching in and improving the 206L4 even further.
For more screenshots, check out the official forum thread.