I use it for inflating kiteboarding kites.  It will not completely inflate the kite when it gets up to higher pressures needed.  However, it's great for saving a lot of the initial pumping time just to fill the bladders with air.  This is especially helpful with my bigger kites that take forever to inflate by hand.  I just hook up the pump, turn it on, and then layout my lines while the pump takes care of about 2/3 of the inflation needed in the kites.  Once the lines are layed out, I just finish off the remaining pumps needed with my hand pump.  This pump keeps a pretty good charge so far and can easily do initial inflations on 3 kites with just one charge.