For the Armenians surely it will be 5 stars and highly recommended. The only thing you should know it is the only subway in Yerevan and it has been constricted during Soviet Union. Could be fine to get reconstructed and got few new trains as well.
Yerevan subway is not the biggest in the world for sure :) Also, unfortunately, it was constructed for Soviet Union times Yerevan when a lot factories worked in the city. Because of that some stations situated not in the best parts of Yerevan. But for some places in the center it is the best transport.
Все классно)
Good place
Надеюсь со временем будут перемены к лучшему.