I'm from the SF Bay area and I get pupusa from Zocalos and La Bamba. While the pupusas here were pretty good I can't say the same for some of the plates. I ordered the bistec something and it was drenched in some sort of gravy. While the meat was tender, it was abit salty for my taste. The cabbage salad they gave was great but the accompanying salsa was very bland.
While I might come back here just for some pupusas.
The drink we had was pretty good. And yes it was a fluorescent yellow.