Ultimately, I was denied after the technicals, even though I received the wrong prep material for them. They even admitted it was a mix-up on their end and would rectify it.

I got through all parts of the coding exam, and the system design was a totally different problem than I had been sent prep material for, but I still did a halfway decent job thinking on my feet.

I had to wait a week and a half to hear back, only to be told I was denied, even though I had been sent wrong information to prepare using.

Very run-of-the-mill questions, nothing insane that you need to prepare for. However, the coding exam is multiple parts, and you should try to focus on getting through them all (6-7 parts). It's possible you just need to go relatively quick; the problem itself is not technically complex.