I would think it’s way better homemade. It’s basically smooshed fish (cod, pollack, etc) formed into patties or balls and poached. A sort of quenelle, if you are familiar with the term (I have foodie friends, I’m not that pretentious - really). I had a friend who would make it for Passover and he always promised to bring me some so I could try it “for real” but there were never any leftovers. He was apparently famous for his gefilte fish.
I refuse to eat it from the jar, but I’m open to trying a homemade version. However, there seems to be a shortage of Jewish people where I live currently, judging from the whopping one half shelf of dusty kosher products in the grocery store. I’m lucky if I can get my hands on a box of matzahs, which really sucks because I’m addicted to matzah brei and matzah ball soup.