I have to say that I was blown away by the ease of use of this plugin and especially the time efficiency during the rendering process. Basically the scene setup was very simple. Just a plane with high subdivision and a couple of displace modifiers on top mapped with noise and smoke. After that, everything else was the plain magic of Forest Pack.
All the geometry used is from it's built-in library as for the material of the trees, rocks and grass. The lighting setup was done using a combination between a v-ray dome light with a HDRi map and v-ray sun. The final image was rendered in about 20 minutest on a i5 2500K machine with 8 Gb of RAM, and although I used low settings it was rendered at 1080p. For me this was the fastest way of achieving photo-realistic vegetation and all the praise go to iToo Software team.