How do I remove permission to specific user using setfacl

I just executed the following command

setfacl -m user:userXXX:r /home/userYYY/private/

now I see

$ ll /home/userYYY/private/     
total 32                                            
drwx------+  5 userYYY quant   512 Sep  5 03:26 ./ 
drwxr-xr-x  41 userYYY quant 32768 Sep  5 12:49 ../

1. Does this little + the result of it ?
2. How do I remove permission to userXXX

The following should do the trick :

setfacl -x u:userXXX home/userYYY/private/

And as far as I know, where ACL are enabled, a + sign is shown.

1. yes

2. use command like this:

   setfacl -m user:userXXX:-r /home/userYYY/private/

or remove user at all

setfacl -x user:userXXX /home/userYYY/private/