I have one.. Do not often use it (only when I have to either push UP hill or a long distance) but it works well There is just one "Gotcha" that got me.. And once you know what it is (next paragraph) it won't get ya ever again.
The impeller sticks if it's not used for a while.... AND they know about it.
So the motor shaft sticks out of what I call the "Bottom" of the motor.
Before you hook it up take a flat tool (IE a quarter or washer) and insert it in the slot in the motor shaft and give it a twist in the direction the outlet suggests you should twist (clockwise I think) then hook up. and power up.
Now I fed mine with 10ga off the main fuse block and anderson powerpoles. that's the other issue lack of proper power feed.. Works great. It is SLOWER than a 3" stinky slinky (Why I don't use it all the time) but when I need it.. WOW it's nice .*I've pumped 75 feet with it and up hill.