The ideas in the books were pretty amazing, unique, and imaginative; but the story and writing itself was quite sub-par.
edit: I listened (audio books) to the English versions. I thought the translation was excellent. I don't want to spoil anything, but the author has a very dark vision of mankind and kept having his characters ostracized to the extreme which got old pretty quick. I didn't feel like the books were missing anything descriptive from lack of translation.