It's not a mcdonalds I'd sit down at. The crowd is mixed. Half of them are nice old greek/eastern europeans who spend all day there catching up on the local gossip. The other half are borderline/over the line crack heads.
Just don't go there after dark. The old people go away and sketchy people run the place.
This McDonalds is the closest one to me so I end up going there regularly since they have dollar drink days on right now for the summer ($1 any size soft drink or medium iced coffee).
The staff is average speed for a McDonalds and the food is like any other McDonalds.