OS-X Psychtoolbox and realtime operation for EEG/MEG

1
Hello,

This question is for people who have used the Matlab psychtoolbox in
EEG and/or MEG (requiring accuracy in the range of milliseconds.)

The document below indicates that if used correctly, Mac-OSX can
achieve realtime uninterupted operation at millisecond-scale accuracy,
even though the system is not designed for hard realtime operation.

http://www.kyb.tuebingen.mpg.de/bu/people/kleinerm/ptbosx/ptbdocu-1.0.5MK4R1.html

My question is, as EEG users of Psychtoolbox, have you encountered any
difficult problems in getting realtime performance? Did you find it
worked well and reliably?

Thanks,
Rob