I found the whole layout of the test kits very customer orientated. It's very easy to work out what to do, with a set of detailed paper instructions, laminated card with instructions on one side and the colour comparator chart on the other. Also, on the back of the box are the same instructions, and on the side is the optimal value and a QR code which takes you to a YouTube video that shows you how to perform the test.
It's excellent, for beginners especially.
Both Nitrate and Phosphate are low resolution. They're both the lowest range I've seen (we'll noticed at least). They cover the range we're interested in, and for nitrate, it gives a finer range than any test I know of.
I have always had zero nitrates, so I expected this to show zero, which it did. I had tested high phosphates, but with an out of date D-D kit, so I have nothing to compare to, but this result seems right, as I do currently have a little bit of cyano. This ratio would put me in the right redfield ratio .
OK, here are the photos...