Ace city is a good society, nice Garden, parking, Gate Entry and many more. Location wise is also good, very close to the Highway & Metro. Many colleges, Schools, Hospitals & complexes are available. I did buy because of fewer crowds, good atmosphere & their affective facilities.
Yes, Noida extension is developing very fast, I bought my flat in Ace City. The best part about this society is easy connectivity from South and East Delhi. Nearest Metro station is Sector-76 Noida. The society is close to Restaurant, Hospital, Institutional Area etc.