I don't know much about Finglas but my gran lives in Edenmore and has done for about 40 years. Its settled enough, mainly working class. Gran has no problems apart from young kids playing out on the road and traipsing through her garden to retrieve their ball (she lives in a cul-de-sac) though its hardly a major issue.
Edenmore is about a 10 minute walk to Raheny. So you have the Dart for getting into town. There are a couple of nice pubs in Raheny. There are two pubs in Edenmore, The Concorde and The Edenmore house (referred to as Eugenes) Its years since I was in the Concorde but it was alway an ok pub. I've never been in the Edenmore house.
There are a good few local shops, newsagents, chemist, Ali's Lido is great for chips...that chipper has been there as long as I can remember

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Tesco in Clare Hall is a short drive away as is Northside, Kilbarrack and Donaghmede Shopping centres. Your not too far from the M50 either.
There are a number of schools in the area. There are two primary schools facing the shops. There is a boys and a girls school..afaik this is still the case. There are quite a few secondary schools in the general area too.
The 42A/42B is the bus service. Afaik the 42B is more regular and uses the Malahide Road whereas the 42A uses the Howth Road. Not sure about the traffic but I would estimate it will take at least 1hr/1.5hr to drive into the city centre in rush hour traffic.
Sports wise St Monicas GAA club, Edenmore Celtic soccer club, Total Fitness gym on the Malahide Road, St Annes park in Raheny has tennis courts & a pitch & putt course.
Thats all I can think of for now. Feel free to shout with any questions. Good luck with your decision.