My installation went smooth (Win 2012 R2). The only thing I did differently from the documentation was that I customized pretty much every port config. I had previously had issues where default ports conflicted with each other (if memory serves this was with the shutdown ports mostly). So to be safe I changed every port I could during installation. I run Oneclick with Report Manger and Jaspersoft on one server and Spectrum on another server.
I also remember having to fiddle with the security preference setting to get Jaspersoft to populate reports with actual data. I think I disabled Security if I remember right. This could be specific to my environment though.
That was it. Everything else just worked.