Spacy is awesome. The API is clean and powerful. I have been using it heavily over the past few months, using it almost exclusively for feature extraction now. I'm currently working on extracting subject-verb-object tuples, which is amazingly easy to do, because I am finding these to be much more powerful than unigrams or ngrams for classification.

Named Entity extraction in Spacy is another killer feature. It's been instrumental in some fraud detection work I've been doing as well.