I uninstalled Reader when in started forcing UI toolbars to be open an visible every time a PDF was opened even after I'd explicitly hidden them. I haven't looked back either.
I have yet to encounter a PDF that doesn't render correctly in FireFox's built in PDF.JS. I know Reader has additional features but I've honestly never used them. You can easily set FireFox as your default PDF view and you're off to the races.
My only gripe is the PDF icon is now FireFox's icon.
I can show you several form-fillable PDF files which FF does not merely break, but absolutely destroys. Then again, I'm not interested in my Web browser invading my offline activity.