This was much cheaper than the Watkins unit. Hopefully it will be long lasting.
Ever so slightly longer than the OEM part I replaced (@1/4") so the holes for mounting were off. Not a big deal but the equipment cabinet is also not a great space to be working in. These newer heaters come without the 'onboard pressure switch/third grey wire'(now obsolete) of my original 2012. I didn't see the explanation on the Spadepot site(may have missed it) but you need to clip the molded plug from your old heater leaving an inch or two of wire, strip the red and black wires/twist them together, and reinstall on the circuit board where it originally went to 'jump/bypass/?" something in order for the heater/tub to work.