I'd certainly argue the USSR was socialist, since wage-labour wasn't a commodity, but I'm probably in a minority on here.
First of all, communism by definition is a stateless, moneyless society without property. No-one has ever claimed the USSR achieved communism, even those who support it - the USSR claimed to be a socialist society in transition to communism. Socialism today would merely be taking what is already a largely planned economy - through the blend of monopoly and state capitalism which has been rising since 1850 - and making it work for the proletarian class instead of the bourgeoisie, through nationalization or collectivization of the means of production.
I'm afraid that analysis of social formations that begins from the state is inherently flawed, as it supposes the state is the centre of political life, when it isn't, the class struggle is. The economically given time period is what's actually important, and what class controls the state, and this sheds much more light upon the actual working of the state in question.
“Socialism cannot abstract itself from individual interests. Socialist society alone can most fully satisfy these personal interests. More than that; socialist society alone can firmly safeguard the interests of the individual. In this sense there is no irreconcilable contrast between “individualism” and socialism. But can we deny the contrast between classes, between the propertied class, the capitalist class, and the toiling class, the proletarian class?” - Josef Stalin, Marxism Versus Liberalism: An Interview With H.G. Wells, 1934
"Those who are in ideology believe themselves by definition outside ideology: one of the effects of ideology is the practical denegation of the ideological character of ideology by ideology: ideology never says, ‘I am ideological’." - Louis Althusser, Ideology and Ideological State Apparatuses, 1969