The keycaps are good for the price. Thick PBT, comparable to Gateron blank keycaps.The spacebar was a tiny bit warped but I fixed it by placing in hit water for a minute and then pressing it flat against a table to let it cool. The dye-sub printing on some of the keys is horribly misaligned/skewed. It is hard to see in the pictures but it is very noticeable up close. But otherwise, looking at the whole keyboard, these are some nice, clean looking and minimalistic cyrillic keycaps.
Forgot To add: the profile turns out to be Step Sculpture 2, which is a tiny bit shorter than Cherry profile. It fits perfectly with the other keycaps on my FC660PD
Good MX profile keycap set, nice contrast ... still little quirks here and there, i.e. the FN key has a larger font size, some russian letters are not perfectly aligned (w, o, l), but nothing serious. Wished the modifiers were of different colour in the afterthought. Can recommend. Delivery took 2 months to Austria.