Product review (5 stars): Right on the money!
I was so glad to find this at a reasonable price and a video ([...] - search for "Door Boot Seal (part #MDS47123604) - LG Washer Repair" if the link here doesn't work) that did a fantastic job of walking you through EVERY step of replacing the gasket.

Our washer is 5.5 years old, but due to community well water, the ring had taken a beating (we've since gotten a great water softening and purification system that I hope has a positive impact on the pipes and appliances; so far, things are MUCH better). To be fair, we probably weren't great at making sure to dry the front of the washer out after each use during the first year or two.

Our model has the LED lamp that goes in the hole in the boot on the left (facing the washer) which is not mentioned in the repair video. When watching the video, I wondered why it was there and it wasn't until I began performing the repair that I realized that's where the light comes in. Our light is held in place with one of those plastic zip ties which you have to cut to remove. Fortunately, I have a ton of those so I didn't need to make a run to the store.

The ring fit perfectly though I have to admit, getting the inner spring off and back on without that $60 LG tool was brutal. The tech in the video makes it look so easy (and with the tool, I would expect it to be), but I just couldn't justify buying the spring expander when it is something I'd use so rarely.

The whole process took about 45 minutes. Much less expensive than if I'd called someone out to the house, and it worked great with not a single drip of a leak!