Going on what the Belmont development prices you'd most likely be looking at 450k upwards, possibly more. You have to remember that you're paying for the postcode in Belarmine. The area is reasonably nice the bus route isn't incredible but you are within walking distance of the Luas at Glencairn. As mentioned before the main road is on a very steep incline so when the wintry weather arrives (and it will more frequently than lower lying areas of Dublin) it becomes extremely hazardous, buses were towed off of it in recent snow and locals who were present in 2010 all park on the enniskerry road in anticipation of snow.
You will encounter random groups of bored adolescents around the shops and playground but anti social behavior isn't really an issue. There were rumors of the parcel of land between Aikens village and the Parkview apartments being developed as a traveller site but I would imagine it's more likely to be developed into standard residential property considering the potential for developers to make a quick buck in the area.
Overall it is a nice place to live but at times it does feel a little over developed and you will be living at close quarters with your neighbours and issues regarding parking seem to be live in every part of the development. During the hot summer of 2013 there were a lot of new babies on our street, with the oppressive heat, living so close to our neighbours and the constant cries and screams of infants it felt a bit like living in an upscale tenement of sorts. Would I spend my money on a house in the area? Considering that you could purchase a house in an established close by area for similar money without all the draw backs listed above, probably not.