We have friends who live there (Marlfield) at the moment. Their house is gorgeous, but they have told us about some (minor) social problems - gangs of kids from other estates fighting and hanging around the green, etc.
There have also been a couple of robberies in the new shopping area.
The residents association seem motivated tho, and they keep people informed.
IMO tho, the estate has gone downhill since they moved in (they bought new). The maintenance of the roads, etc. just isn't good and some parts look shabby. Also, a lot of people are moving on and my friends are looking to do the same... they have been happy there to date, but don't want to raise a family there.