Skeptics say that the GLONASS devices have no chance, they say why buy a more expensive dual-system device, if GPS works well. But the market has decided otherwise, and that double-system device is popular. And without any promotional and protectionist measures from the government.
Review of devices can be read at this link. But if recap — the market appeared qualitatively and made functional device is quite adequate for the price of 3000-3500 rubles. And the market responded — GLONASS to be!