Apache Lucene

What do you like best?

Easy Implementation and writing/generating Lucene queries are very easy. The implementation is very fast and effective wrappers can be built around it.

What do you dislike?

Limitations on some logical operator. For example, operators like exclusive OR might be difficult to write as lucene query in complex situations.

Recommendations to others considering the product:

If you are thinking to consider a database for fast retrieval of documents, lucene is great and extendable.

What problems are you solving with the product? What benefits have you realized?

I have used Apache Lucene for research in Natural Language Processing tasks like Named Entity Recognition and Commercial application to get documents related to search query.