Using it at my company with Clojure, quite happy with it. I prefer it to RDBMS as a default OLTP store now.

Cannot recommend it enough for the sorts of things one would use PostgreSQL for.

Support has been quite good too.

Only regrets/dislikes:

1. It's a young product and it shows.

2. Migrations. z0mg. I'm working on a library that I will open source sometime in the next month hopefully to ameliorate the pain here.

3. I wish we had compromised less on the schema for legacy reasons.