The short version
Choa Chu Kang is a self contained western town built around a busy interchange, mature housing and access to the green north west. It is useful rather than glamorous, with enough services for daily life and a clear commute tradeoff for central workers.
The town centre and interchange are the practical anchor. Older and newer estates sit alongside parks, schools and the route towards the western catchment. The spread means the exact block matters. A home close to the centre is convenient but busier, while an edge estate may be greener and more dependent on feeder transport.
This is a good family base if school and work are west side. It is a less attractive proposition for someone who wants a small urban neighbourhood or a short journey into the centre. I would live here for completeness, not for status.