I am not a huge fan of musical comedies, musical action films or musical romances, and this movie is all of it in one. One should expect the characters to break into a song at any time during the movie as it is basically a filmed operette, loosely wrapped around the famous novel by Alexandre Dumas. Think 'The King and I' in Russian. Nothing unusual, however, for many Russian movies of the time. Songs were probably the only and the best sound effect available to Soviet directors back then.
However, in this particular movie everything fits in pretty nicely. Boyarsky's good looks (I dare anyone to find a better D'Artagnan in any film), Tabakov's silliness as Louis XIII, even Terekhova's acting as Milady. Credit is due to Yungvald-Khilkevich for putting it all together. The songs, written just for the movie, fit perfectly into the plot, and have become Russian classics, instantly recognized by anyone even now, 20 years later (pun intended).
The action sequences are quite good, the cinematography is beautiful, Porthos is lovable, Constance is a knockout. What else do you want from a musketeer movie?