Moths ago, I have evaluated HL PI. It looks well . DC Analysis is ok, but AC Analysis have something seems confused. For example, The port location in meshed model always have an offset to the port's real location. It may be underdstanded to real design because the mesher have the limit, but it can't be understanded to a very simple example where only one port be put on the center of 8 inch X 8 inch 4L board(Top/Gnd/VCC/Bottom).