Build quality is generally good, but as I've experienced with other Oktava equipment, it doesn't all quite fit together nicely
I have to really push my MK-012s (they're not counterfeits by the way!) in to the holders to get them in, it puts alot of pressure on the mic stand, and is better done before attaching to the mic stand. And when I take them out they pull out the inner casing, which I then have to forcefully pull off the mic and fit back into the holder. Something you'd expect more from a non proprietary holder.
However, as I've experienced with other Oktava gear, the sound results are excellent for the price. Along with a matched pair of MK-012s and a figure of eight attachment I've got suprisingly good mid-side results using this.
So until I win the lottery I'd definitely buy it again and work around these caveats.