Cons: Cannot into economics, a bit too brutal at times, pretends to be scientific but isn't, is anti religion to some extent esp early on, most western communists today are utterly cringe who would be shot in a communist country, pretty drab architecture and existence tbh.
communism is a stateless, classless society where the workers own the means of production
stateless- the state is the organization with a "monopoly on violence" or, an organization that can commit violence on you (through police for example) but you cannot commit violence on it. Most communists believe that a state is necessary for a period of time in order to protect the already socialist society from capitalist countries invading it, but do eventually want to get rid of it.
classless- marxism defines 2 classes. the bourgeoisie and the proletariat. The bourgeoisie or the capitalist class makes money by owning things (eg. a farm, an apartment building, etc.). The proletariat or working class makes money by selling their labor. There is obviously some overlap, like someone who inherited a house from their parents that the rent out for extra money while they also have an office job. communism seeks to abolish this class divide through collective ownership of the things that the capitalist class would make money by owning.
moneyless- the abolition of money, usually in favor of a mutual aid system.
where the workers own the means of production- private (not personal) property is owned collectively by those who would use it. (eg. all the workers on a farm collectively own the farm)
There's a bunch of different idealogies withing communism (marxism, maoism, syndicalism, council communism, trotskyism, marxist-leninism, stalinism, anarcho-communism, etc.) Viki1999 has short-ish videos on a bunch of these that I'd recommend cause I do not understand some of them well enough to provide an accurate summary.