Loved reading all the responses on this! Without wanting to hijack the thread: do you guys recommend Rx over Firecracker? Looking for something with spaced repetition throughout M1 until starting Uworld.
Firecracker is probably the resource with the best content out there. Has everything you need. The problem is the cards are total trash, so if you want spaced repetition, you should look elsewhere. Then again, I know people who got very high Step 1 scores that swear by it.