I replaced the water inlet valve. The toughest part was closing off the feed line while I waited for the valve to be delivered. The needle valve used to install the feed line wouldn't close completely. I ended up fabricating a plug from some parts from the hardware store.
The mounting bracket on the new valve was completely different from the original, but it still mounted easily enough. The 1/4" plastic hose fitting was a different type from the original, but the hose fitted into it easily without having to cut any off. Unfortunately, the hose snapped at the fitting (I probably should have cut a bit off even though it looked OK), so it leaked water on the floor whenever the icemaker activated the valve. I fished the hose stub out of the valve with a corkscrew, cut the end flush and remounted it. So far so good. When the hose was snapped the valve is a lot louder than when the hose is functioning, so if it sounds unusually loud and you aren't getting any ice, suspect a broken hose.
There was barely enough 1/4" hose to mount the valve. After the hose failed and I cut it shorter, there really wasn't enough, but there was another screw hole about 1" higher, so I used that.
If your old valve has a threaded mounting for the 1/4" hose, know that the new valve does not. AppliancePartPros provides a link to a how-to video. Watch it - it explains all about the new hose mounting.
I mentioned in the survey that the project took 1-2 hours. That includes dealing with closing off the feed line while waiting for the valve to arrive, and mounting it twice after the 1/4" tube failed. Simply mounting the valve is only a few minutes.