Stanisław Lem "never had a high opinion of American science-fiction, describing it as ill thought-out, poorly written, and interested more in making money than in ideas or new literary forms." (
http://en.wikipedia.org/wiki/Stanislaw_Lem)
Here is an essay of his that, in part, elaborates on his views on science fiction:
http://www.depauw.edu/sfs/backissues/5/lem5art.htm
- Ahi