it is, older trains are a bit too loud for my sensitive ears, but aside from that it's fucking beautiful, trains are very frequent, pretty cheap (~5 usd per month for students), soviet aesthetics UwU

but alas the city government is trying to fuck it up: newer trains, although more spacious and in general more comfortable, have fucking tv screens that show ads, older trains are starting to get more and more poster ads, when going down/up the escalator you are subjected to like 40 giant (3 by 2 meter) ads, the fares have more than doubled in the last ten years, newer stations look meh, there are facial recognition cameras on every terminal on most stations, there are cops on every station enforcing that everyone buys a ticket etc etc

with all that, public transport is just one component, although significant, needed for proper urban landscape, and moscow fails in almost every other component