I just used the AAPMR and Demos (PM&R Q&A review) qbanks. I think Demos is Springer now, but they publish a book as well as an app-I found the app made it easy to do questions during downtime in residency.
I found the Q&A more user friendly than tha AAPMR qbank, as the latter doesn’t contain any explanations.
And Cucurullo for reading things I didn’t know well (based on question performance) more in depth.
I also took a board review course as my program paid for it.