yea, super low yield, not worth it. I'd go so far as to say that 70% of Firecracker is low yield. After doing Uworld and going back to Pathoma this week, he literally talks about every goddamn question/concept that I got wrong in some manner or another, but the things that did stick were tested in exactly the way he outlined them in his lectures. In contrast, FC probably gave me 10-20 questions right on Uworld that I wouldn't have gotten otherwise and even then, after getting it wrong on Uworld, I would have remembered what's up.
There are just so many cards that are like "what are the 12 signs/sx of disease X" when you need like 3 to make a diagnosis and go from there. It's also badly organized. I tried doing the viruses on FC and just gave up because there's no organizeation to it. I spent a day on FA's section on viruses and now I know them cold because the table is actually organized properly. Now when I see a virus, I can just go to my mental picture of that table and easily ascertain it's characteristics (eg ssRNA, enveloped etc etc).