I also had trouble with tornado. First one the fitting broke. Second the fitting was made better but stopped spinning.
Installed quickie this year so the jury is still out. I bought real fittings (home depot) and connected with pex to the inlet to avoid any issues with the flimsy hose and clamp supplied. I also custom drilled additional holes to direct additional water to the rear of the tank and toward the sensors. Worst case it will just speed up the fill and drain process. Installed on the side 2/3rds toward the back (away from the drain) and seems to work just fine. Same position as the tornado.