After receiving I was excited and wanted to test it with my USB-TTL adapter using the Breadboard but realized that its pins are incompatible with my breadboard!! The nest solution was either to buy or etch an interface adapter.The commercial boards are costly and I didn't have the patience to etch one or order to fab the PCB so I built mine out of Veroboard and also designed Pin Labels for ESP8266-01.
Here is the link to my Instructable where I also attached the Pin Label file for helping others who are facing the same problem.
http://www.instructables.com/id/Sleek-E ... -Pin-LABEL