I looked up the review for this in an old movie guide I used to use (Video Hound) and I was surprised that it gave it a fairly low rating. It focused on a negative comparison with 2001 and complained that there was too much talking in the film. This strikes me as a strong indication of cultural bias, as thought the Russians weren't allowed to have their own investigation of memory and the symbolic place of outer space. Which is to say that if you just want to compare movies to 2001 this isn't the movie for you.
That review couldn't have been any more misleading. This film is loaded with long saturated shots that make you feel like you're watching someone's old family photos come to life.
--semi spoiler warning--
The plot is simple but captivating: a dead loved one comes back to life. This is equal parts curse and blessing. This movie fleshes out most of the nuances of this scenario while maintaining a sustained mediation on memory and visual reproduction. A must for those who like Videodrome type movies.