CHIRP is fine. If your radio came with a programming cable, it's the obvious choice. It is several cuts above the software (ahem) that comes with Chinese radios. The RT Systems software, IMHO, is, however, easier to use and more full featured. And a big deal? With the RT Systems cables you will not be playing the counterfeit FTDI USB-serial drivers game, trying to get your PC to recognize the radio as you will be doing with many of the el cheapo radio cables from China.