Product review (5 stars): Now the water is getting nice and hot
Worked perfectly in our Kitchenaid stainless steel washer.  It had been leaking lately, and the washer has started stinking and not cleaning well.  The heater had cracked at one end and was corroded and that was the cause of the leak.  I'm thinking the heater wasn't heating the water enough (or at all) either and that was the source of the stink.  The bottom of the tub was slimy.  Now the water is getting nice and hot, and after only one run, the slime is gone and the stink is gone.  The leak is gone too.

Simple to install for anyone with mechanical inclination.  Just pull the washer out as far as you can without unhooking anything.  Look for two 2" or so long white plastic nuts with a single wire coming out of each one.  Pull the wires off and unscrew the nuts.  The corroded and cracked end of mine broke off, so I had to clamp a vice grip on there and have my son hold it while I turned the nut with a wrench.  Clean the holes when you get it out so the new one will have a good seal.  Install is opposite of removal.  Don't overtighten the nuts.  They are plastic.  You just want the rubber washers already on the new element to bulge out just a bit.

The new control board wasn't much harder.  The top part of the outer door on ours removes separately from the rest of the door.  There are about 8 Torx screws.  Remove them and fold the control panel down.  The control board is held in by clips on the end closer to the middle of the washer.  Just unhook them, and tilt up to unhook the other side.  Don't unhook any wiring yet.  Put the new board in the same way the old one came out.  Unplug one set of wires at a time and plug in into the new board.  One plug on ours was vertical on the old board and horizontal on the new one.  There are markings near each pin to show which color wire goes on each, so you can see you are putting it on in the right direction.  There is a thermal fuse attached to one edge of the old one you have to remove and attach to the new one.  After you've moved all the plugs and the fuse, reassemble the door panel.