I have had a set of Faber-Castell Albrecht Durer watercolor pencils, a set of 60, lying around for several years. As I have been focusing intensely on watercolor painting and drawing, I figured I should dig them out. A scribble here and there is what I have done with them, but have never attempted a “serious” or complete picture with them.
They get pretty good reviews, and come in tins and boxes of varying number, as well as are available individually. I found their pigmentation pleasant and easy to use. Like watercolors, you need to be careful with your brush. YouTube videos show various ways to use them. I am inclined to think they work best with a bit of reserve or delicacy, because my own picture was anything but that.
In my picture, I did layers, followed by using various brushes of different sizes. Iron gall ink was used for the initial sketch, and then at the end to draw more lines and such. Below you can see the layers of pencil; in between each water was used, and then more pencil laid down.
And here is the final product. I was surprised by the results. I am sort of pleased, sort of not pleased. The goal, though, was to learn about watercolor pencils. I enjoyed the experience and know I will do it again, perhaps with a different approach.
Ink, Yarn & Beer 
Looks good!
I’ve used pencils to enhance traditional watercolour with brushes. They allow for interesting textures you couldnt get with a brush such as shaving the lead over a painting and letting it land onto damp paper or just wetting the leads and applying to damp paper. You can then mix it up further by applying a brush to the shavings or lines you’ve created. I must admit I dont have your selection, I just buy them individually.