Most of my students that use MS Access say that in CR it is easier to accomplish the same things. However if you can already do everything that you need in MS Access, it may make sense to stay there.
In CR, the filter and formatting are packaged together in the RPT file, not like a form and query in MS Access.
1) I like the cross-tab feature of CR better, they are just objects on the report.
2) It is easy to create totals and use them in formulas and for filtering.
3) The automatic running total feature is nice.
4) Extensive conditional formatting is available for just about every object.
5) TopN and Charting seem more straight-forward and more flexible.
CR also has some runtime capabilities so that a program can launch a report without requiring CR a licenses. Your users can also run the reports in real time using a free downloadable viewer, although they are trying to discontinue this.
One reason you might want to be careful about switching is that CR has restrictions on what you can do with the PDF if you "automatically " post or distribute it. Read the details about this on my web site in the section called "fine print". Ken Hamady, On-site/Phone Crystal Reports Training/Consulting
Quick Reference Guide to using Crystal in VB