“I've only given my review 4* since I've not had a chance to use it yet. I bought it to replace the popular GPS module I'm using just now which works well indoors using an antenna but only has a USB (Tx/Rx) port and the UNO R3 only has one Tx/Rx port (which I'm using for a RT-clock). I don't anticipate any problems connecting it to I2C since the quality build of this breakout board looks very good. It comes with an antenna, connection wires and an include.h file which can be downloaded for the Arduino. The service from PiHut was also first-class with delivery within a couple of days and YES I'll order from them again.”