It's very fast, works well out of box for our needs without any customization required. The query language used by tarantool can be complex compared to other databases but it has great support through online help & forums. We use this database as an internal RDBMS at my work place we are also using some external apps which talk directly into Tarantool DBs like Kafka etc., so its one stop shop from application development point view too. This was simple enough to implement for us internally though there could have been more documentation around how things should behave when multiple applications try writing/reading off same db object. Also would love if they provide additional API layer over existing drivers. Internal RDSM for customer tracking and management across several organizations.