There are no alternatives. They all suck (see Kaplan medEssentials). The market is closed. Everyone gets first aid. most people get goljan rapid review. Everyone gets a Qbank (kaplan or Uworld are best).
Think about what "riddled with errors" means. Because you read it you get 225 questions right. But oh gnoes! Errors strike! 5 questions wrong! Were you really going to get those 220 questions right without the resource? IF errors are to harm you, then you would have to:
a) have learned it right without First Aid
b) remembered the right thing to begin with
c) reasoned the question to the wrong answer, because of the error in the text
d) have never learned the contrary information in any other review source like your notes, the Qbanks, or goljan.
Chances that you will get a lot of points on Step 1 because of FA? High. Chances that you will miss one or two questions because of errors in FA? Yeah right, chances are you just forgot the information to begin with.
You are more likely to just not get the question right than you are to suffer from errors in the review source. You are also more likely to increase your score from having read it, errors included (even if you were dumb enough to not catch them and change them from other studying).