Product review (5 stars): New gaskets save money  in the long run
Old, worn gaskets allow for heat and moisture infiltration into you fridge. They cause the compressor to run longer to reach the desired temperature, the fridge does not hold temperature as long, and food will not stay fresh as long. So, in the grand scheme of things, replacing an old, worn gasket will save you money.
The gasket came in a timely manner, and is well-made. The best way to install it it to take the door off and lay it flat - it is very easy to do, and it makes the removal and installation of the new gasket a quick and easy job. My refrigerator door has an ice / water dispenser water line running through it, so I had to disconnect the water line, and that was quite simple. Also - place the new gasket in the tub with some warm water to cover it. This will loosen it up a bit to make installation easier, and also take out some of the "shipping kinks".
I advise you to look at YouTube. There are several very good videos on the installation process worth the time to watch before doing the job. I recommend that you replace the refrigerator door gasket at the same time.
The only disappointment I had was the price! It seems like a lot of money for a piece of rubber gasket, but they got-cha - supply and demand! Lol! Good luck!