Don't want to rain on the parade, but can someone explain the...

Don't want to rain on the parade, but can someone explain the benifit of this system, compared to the numerous other needleless systems already on the market, just type in needleless injection into Google to see what I mean, or go to this site http://www.robbinsinstruments.com/dermo-jet/dermojethome.html
for one example.