Hi Fvkeiko,
We bought on mask avenue 4 years ago this sept... (just near the high point). It is a very quiet street. There is a real mix of ages on the road - but a lot of the houses that come up are executor sale - so a lot of them need work (ours was a 1970's relic !!). I think prices are taking a hit everywhere. The families on the road that we have encountered are lovely...
Safety wise - we have never had a problem; my husband walks to killester station which is a 15 min walk away.
Amenity wise - the bus corridor into town is great; 15 mins and your there. There is a spar, great chippers, chinese, and off license within a couple mins walk. We also are using a local creche which is lovely. The tesco in artane is a 5 min drive. Recreation wise - St Annes Park is a 20 min walk away (its a great park) and dollymount strand is at the other side of it.... The goblet Pub is supposed to be ok; but with the bus service so good, we tend to go into town if we are going out.
Its a very handy little area...