Use ECP or Nicoll to get to CBD from D15. Best is Nicoll cos ERP only kena once. ECP u kena once at Rochor Rd Exit and kena another time at CBD gantry if exit through Prince Edward Road.
Traffic jam is still tolerable / acceptable. Only takes me 15 mins to reach office from home. If off peak hours, hoho...only 5 mins!!!
I recommend D15 for anyone looking for a home in the east. You basically have all the good stuff here except no cinema (damn) ....beach, schools, food, shopping, pubs, MRT, library
You get to see the Singapore Flyer and National Day Fireworks too if your unit has a good facing.
I never like the West in my opinion. All my families, relatives are in the East. For instance, the West Coast Beach at night - it's too dark, quiet and dangerous, and occasionally you find folks sniffing glue / smoking grass.... also, west areas are more prone to rain plus problem of air and water pollution from the industrial wastage.
I saw some stating 1500 psf in D15...nah, only for a couple of new developments that sell these kinda prices for the rich and famous. Take a better look around, you can still find gems less than 1000 psf.