Are you sure that those apartments are in Rahway?
The only Duncan Hill apt complex with which I am familiar is located in Westfield.
If that is the one to which you referred, be aware that there really aren't any bad locations in Westfield, hence the relatively high price for those older apartments.
The only negative thing that I could say about living there is that, if you are traveling to Rahway for work, you would have to take Central Avenue through the Clark traffic circle, and the congestion there is...considerable. However, that is a small inconvenience to have to endure for living in a nice town like Westfield.