Not perfect, not bad - minus point clearly: Pollution

Good set for smaller craft, the quality of the sewing thread itself is nice - it is not as cheap as many other sewing in low price range by far - and the colors are both bright as well as selected in a nice variation. What bothers these were some rollers are dirty and this has transferred to the yarn - it looks as if this is happening on the role when winding the yarn, apparently is fat or oil.
If you put on clean sewing value you have to roll the first few meters and dispose of and at only 100m per roll some meters are of course a lot. Overall, I would give a buy recommendation but if you want to have short-term and low some yarn for little work on hand.