Also have been using spaCy with good results.

Just installed syntaxnet - tests passed in the following setup.

https://gist.github.com/Hendler/61831e411069815ee4ed490f553f...

INFO: Elapsed time: 908.048s, Critical Path: 640.26s

//syntaxnet:arc_standard_transitions_test PASSED in 0.0s

//syntaxnet:beam_reader_ops_test PASSED in 20.9s

//syntaxnet:graph_builder_test PASSED in 16.3s

//syntaxnet:lexicon_builder_test PASSED in 1.8s

//syntaxnet:parser_features_test PASSED in 0.0s

//syntaxnet:parser_trainer_test PASSED in 46.1s

//syntaxnet:reader_ops_test PASSED in 5.7s

//syntaxnet:sentence_features_test PASSED in 0.0s

//syntaxnet:shared_store_test PASSED in 0.5s

//syntaxnet:tagger_transitions_test PASSED in 0.0s

//syntaxnet:text_formats_test PASSED in 1.7s

//util/utf8:unicodetext_unittest PASSED in 0.0s

Some other notes:

Also using Keras with Theano. Before spaCy, StanfordNLP, Freeling, and/or NLTK.