Setup is fairly simple with downloads for Linux, OS X, and Windows. This isn’t an ESP8266 shield, either: you can write code for the ESP module, connect the serial pins, and hit the program button.

EEPROM Issues The ESP8266 doesn’t have a true EEPROM. But the Arduino software emulates it with flash. When you want to use the EEPROM you have to inform the library how much memory you will use.