It's actually quite a nice area, but depends what you're looking for. Beach, national school, countryside and Bearna Woods within walking distance. Convenience store close, but everything else like pints and major shopping needs a drive.
Ros Ard and Woodfield are the more mature and nice estates that I know of.
Nearest national school is the Gaelscoil Mhic Amhloaigh (sp?) which is on the Cappagh Road (beside Cimin Mor estate). There's also a secondary school planned for knocknacarra (on a site about five minutes walk away) for around three years time.
What estate you looking at or is it Cappagh Road itself?