jee Sharo bhai the desi tareeka, if done properly works fine too 
but with the passage of time the wire wound around the connector becomes loose and with the passage of time sulphate builds up on the copper wiring, which in turn deteriorates the quality of connection 
The desi walla tareeka works very fine if done properly, although i am in the favor of getting it done from inside the head unit 
But thats just me 