I used both in my test prep. I liked the online access of Wiley, but I liked the user-interface of gleim better. Wiley interface is identical to the actual exam, but its grey and ugly and not something i want to stare at for hours and hours. For practicing, I liked the way gleim looks much better.
The questions between them are very very similiar, if not identical in some cases because they are both licensed from the AICPA. I liked the gleim publisher questions better than the wiley publisher questions though, and I like that Gleim tells you which questions are former test questions and which ones are publisher. If I get a publisher quesiton wrong, I feel less bad about it than if I get a former CPA exam question wrong.
CalCPASoon....CalCPAFinally! Yay I made it!
CPA licensed in California!