It does a good job, it is just hard to get use too, and you need to know the quirks about it. Especially if you are running a back bone. You need to keep the head pressure below 2.5.  If the head gets too high lower the GPM down. When I talk to Phil Tacker this winter he said 1,500 gal was about max on 15" pipe. I don't think you can push that much water without a plow out.

Another think you need to do is go to calculate design. use the option "user hole selection" tell it what size holes your hole punch has. if it seems to want to use to small of a hole delete that size from the selection. Which makes it use the bigger hole, some times you have to do that to make it work. I don't know why, and Phil didn't either.