A newer version of PDF-XChange Viewer is available.Or, Learn More About PDF-XChange Viewer
Full user review
"Works great on my Win7 64 bit system."
Does everything I need. Uses less system resources than others I have tried (much less than Adobe).
None so far.
Last year I got tired of Adobe sucking up recourse's, so I started trying different PDF programs, so far this is the best I found. I have been using it since last year.