Study Aids

Has anyone heard anything - good or bad - about the new Quick Reference Sheets from Cisco Press? I would be interested to know if the CCNP Sheets (also called Short Cuts) were of any help in studying for the new exams.

What is the consensus for best Cisco study aid for the CCNA, CCNP, etc? My library is predominantly Cisco Press; however, I also like O'Reilly.

Any thoughts, opinions, etc. are welcome.