Several of these vehicles were used during the Dieppe raid in 1942. Sdkfz 251 D regular and SP versions, Ostwind, Wirbelwind, and several PzkwIV models. This company is located in the Ukraine. Actually on the lower end of the quality spectrum. Few parts, poor casting and suboptimal fit.
Instructions are fair.
May no longer be in production, and I don't have a complete list of their offering. The museum has their ASU-85. None yet, though I've heard rumors about an ASU-85. See also the Omega-K website. The kit seems on par with other models produced by East European manufacturers.