Posting my step 3 experience here as it is not usually what I see people do.
I studied for a month.
Did 40% u world (topic wise)
Did 8 ccs and had 3 days gap between day 1 and day 2.
I passed.
I gave my CK in September 2018 and gave step 3 in March 2019.
Uwsa1 …194 5 days before the exam
Uwsa 2… 200 2 days before the exam.
I just gave it as I was out of time and just wanted to get over it.