The many subtle changes that are available give for me too many options to find the right combinations. It was always the standard set of sliders that I would use. Now I noticed that with some more help it is possible to get even better pictures from color point of view.
The differences can be small but still good to have and I think difficult to reach for me without some help.
The brushes are used for more focused work as can be seen with the sky differences.
In the website demos it looks easy, but still lot to learn as titles need to get linked to results. This will take time but sometimes looking at the examples might help.
For full overview of the first set see my photo page Sleeklens, the originals are not added to that page so you might need switching between some pages, mainly America and Off the Grid.
For more information on the presets you can visit the Sleeklens Lightroom landscape preset pages on landscapes or the Lightroom general presets.
They have a lot of different areas that might be useful for other types of photography for this see the full overview with also the Newborn templates (maybe interesting for some of the previous members of the photo group that helped me starting up) or more for fun the Gift Certificate Templates.