IMPEXP is a very flexible extension, allowing you to map fields in a csv file to Joomla/Jomsocial fields and import the data, no matter what order you have them in your file. The support from this company is outstanding! I had a deadline to meet and a large file of user data, and I couldn't import it due to permission problems on my server. The support rep (Garima) fixed my file errors and imported the data for me! She also worked closely with me to figure out why I couldn't make it work on my side. I highly recommend this extension and give the support team the highest rating!