I tried doing this on a day it was pouring outside so I had run my engine for 5 minutes like it said, then gave it a few pumps until it was getting too hard, went inside for 20, came back out to see if it was done and noticed not even one whole quart had been filled in there.  After a couple of times doing this I ended up running my engine for 20 minutes, keep in mind I was only down one quart at this point and still was registering on the dipstick.  After warming up the oil that much more it made it easier but I had to pump it every couple minutes.  I think next time I'm going to do it after driving for a while.  I love how you don't have to touch any oil though, except even after trying to clear out the hose at the end, I had oil residue come out and get over the floor.