I am an artist and also photographer and card maker and I just love the watercolor pencils. I use them everyday. At first I couldn't sharpen them then I got an old type sharpener that we had in school and I was on my way. The only thing with the pencils is that they are very soft so you have to be care sharpening them. But, I still keep going because I love them.
I have all 6 sets & love them all! The colors are great & cover a large spectrum for colors- They also blend really well! Only downside is that there are a few duplicate pencils throughout the 6 sets, so you may not need ALL the sets-BUT the duplicate pencils I found are mostly the neutral colors & I personally use those a lot, so I don't mind having extras of certain colors/pencils.