We have a child at Campbell in pre-K.
I think the principal is fabulous, not perfect as none are but very responsive and generous with her time. Very welcoming of concerns but still able to direct the school effectively, make decisions, and lead student achievement.
http://www.arlington.k12.va.us/15401082104136983/blank/browse.asp?a=383&BMDRN=2000&BCOB=0&c=67643
As in any school, there is variation in teacher quality or at least the level that the teachers embrace the professed philosophy of the school.
Also at times, I have found the overall environment not as welcoming and warm as it might be, but from what I have heard, it may still be more welcoming than other schools?