I grew up close to Kinvara and spent most of my life in and around kinvara with friends. I am 27 now with two children and would give my right arm to move back there.
It is a very nice area! there are alot of young families around Ashington (friends i went to school with who have now bought there own houses in the area). There is a mix of older and younger.
I do remember us hanging around in gangs at corners and especially beside the chipper, not sure if this is a problem anymore.. but i am sure you find that everywhere.
It is really handy for Town, shops and being close to the phoenix park is fantastic.
There is a really good girls and boys primary school a stones throw from Kinvara avenue and two good secondary schools.
I would advise anybody in a postion to buy in this area or anywhere around the Navan road to go for it.