Obviously, I opened this with the highest possible expectations. But while it may sound sacrilegious to some comrades, I did not enjoy 200 pages of a rabid Lenin foaming at the mouth at Kautsky, Proudhorn, and other perceived heretics. Halfway between polemic pamphlet and theory, I found the most interesting bits in Lenin's direct and extensive quotes of Engels and Marx. Nevertheless, one must admit that while Lenin's prose is never pleasant aesthetically, it sure is sound, comprehensive and born of a powerful mind. 

As one of the most important bits of theoretical clarification, Lenin quotes Engels in conceptualising the state as emanating from society and the mode of production, but then alienating itself to become removed and a tool of oppression. But coincidentally, what was the Soviet Union if not a state machinery born from the people's revolution but alienating itself only to transform into a repressive bureaucracy entirely removed from workers? How can one possibly reconcile Lenin's vanguardism with the notions delineated in 'State and Revolution'?
Chomsky, for all his faults, has a great discussion of State and Revolution on Youtube, where he discusses how this work is written by a Lenin that opportunistically (ironically) wrote this piece much closer to the German Marxist mainstream à la Luxemburg and Liebknecht to gather street credit among Marxists than what he wrote before or after, and had nothing to do with the policies he favoured and come to execute. Having read this, I must agree: This work tells us much more about Lenin than Marx & Engels.