I received my result recently and decided to write a review because I passed despite failing the 2 UWSAs
Total preparation 2 months ( on and off 4 to 6 hours)
Preparation material : UWorld (once random and then only wrong ones) + Uworld CK notes + Uworld Biostats
UWSA 1 183 ( 3 weeks before the exam)
UWSA 2 190 ( 12 days before the exam)
Last 12 days i revised complete CK notes, completed the wrong ones from uworld and biostats.
Real deal: 210
For CSS i did interactive cases from uworld X 1.
Day 1: almost 8-10 biostat questions. All concepts were covered by uworld.
Day 2: CK type, but i was guessing a lot of questions which i think is norm in Step 3
Practice CSS as much as you can because I had issues with timing during the exam and was not able to complete 2 cases (software at prometric is much slower than Uworld). I figured out the CSS helps you to pass the exam even if you dont do well on MCQs.
Best of luck .