It's also one of those things you forget that it's really easy to make, too. One of the most "It's super worth it to make this from scratch" things out there for sure!
I always make it myself, but most of the time when I eat it, it's thawing out cubes of the stuff from the freezer. Which IS good, but nothing compared to eating it the day of cooking
If you let it sit in the fridge overnight before freezing, it will be so much better. If you do have to freeze it the day of, let the sauce simmer longer with the lid off so more of the water evaporates and the sauce is thicker.