In the top of page 6 (1. Overview) I read:
Espressif provides the SMD module - ESP-WROOM-02 that integrates ESP8266EX.
The module has been adjusted to get the best RF performance.
We recommend using ESP-WROOM-02 for tests or for further development.
Well, what does the last sentence actually means? Ok, the module is recommended for test or development purposes but NOT for a production use?