As far as I recall from my previous questions, and I believe some answers from Fry and other's who are knowledgable, naggy mac uses 0 active hacks (warp/ghost, etc), so (unless it was posted somewhere that I'm missing) should be about as safe as using MQ is currently...
I still haven't had the opportunity to use it, BUT if things go well with this recent patch, and our great devs get us back up and running by next week, I plan on using it over my vacation to grind out some slow AA.