I've discovered that with some apps there are issues if you switch on "Full Content" logging instead of the "Access Only" default option, if you've purchased SuperSU Pro.
The workaround is easy, just switch back to the "Access Only" option (for both the "Global Default" under settings or any apps you've specifically switched the "Full Content" logging option on for).
I found Root Explorer became extremely slow with "Full Content" logging on, the /sbin folder for some reason could take up to 45seconds to open. And with the Global Default set to "Full Content" logging, some apps struggled to acquire root the first time, I guess within the allotted 9 seconds.
Other than that, SuperSU seems to work great.
Sent from my Galaxy Nexus using xda premium