Funny thing about the CS review forms is that they have stars. If there were a comment section, I would have replied:

You have a 90% chance of getting 1 star, but it will fail 50% of the time.
You have an 85% chance of getting 2 stars.
You have a 70% chance of getting 3 stars, if you fail it will return to 1.
You have a 50% chance of getting 4 stars, but you will go back to 0 if you fail.
You have a 45% chance of getting 5 stars, but it fails 90% of the time, so I have no idea what happens if you succeed. When it fails, take 2 drinks because you'll be back to 0.