Sorry to bump, but a relevant question:
I'm fresh out of residency. During residency, I did all of Rosh for the inservice -- 1200 questions as of this post -- and am debating what to use for my qualifying exam come Fall.
I'm a question guy. Was planning on PEER VIII with some First Aid browsing. I felt Rosh was helpful for the inservice overall. Have never tried Hippo. I read the above posts and posts elsewhere with people basically torn on which (Rosh versus PEER) is more indicative of the real thing and/or which was more worth their time. Especially with the additional Rosh-for-ABEM questions not being really different from what's already there as per hoot504 above.
Posting to get others' opinions in addition to those above (thanks, guys!).