Some kits I had did not work well, but this crystal growing kit works very nicely. I recommend it. Again, I recommend using a container with a smaller cylinder radius for crystal growth, where the crystal will grow.
I have had many crystal growth sets and not all worked well. Here the growth works very nicely. The only thing I recommend is to use a smaller container in terms of the cylinder radius. This achieves larger crystals. Overall, I am satisfied with this set.