Just coming back to this thread. I usually have three tabs up and in the background: Datasprout, AKReports, and BookReport. Once I popped datasprout on, I stopped looking at the others. My only complaint is that it doesn't work with other storefronts. Sign up for the beta, it's definitely worth it.
For me, I love that it compares current month to previous month. At a glance I can see where my sales are compared to the month before. Only thing I'd love to add is a way to mark a book that has a promotion running. So the data would have an asterisk by it. But that's a pipe dream wish. I've pretty much stopped looking at everyone else. It doesn't have ranks or reviews, but honestly I don't think either AK reports or Book Report has a good implementation of either. It's nice to have them, when they work.
https://datasprout.co/Thanks for pointing this out, LV.
(Seriously, I am not a shill for Chris, I swear!)