Added on November 1, 2012, 11:11 pmIt depends. Are you going to stay in city's centre area? Or stay with friends/relatives, which if they are on northern side like woodlands, admiralty, sembawang, yishun, Ang mo kio, will be faster if u get down at woodlands.
Also, for convenient sake, if you drag big luggage, you need to bring down at JB immi if take 170 or the yellow bus. If take express bus from kl, don't need to take luggage down at JB.
Then you have to queue after JB immi to board 170 and pack with other ppl with your big luggage. You can imagine is like u drag a big luggage at KL Bangkok bank to board buses during peak hours.
SG immi, all hampalang lungjung have to drag down.
For first time, I'll advise take until SG.
If adventurous, then on the way back, goto Beach road take 170 to Larkin and buy ticket there to KL or other destination.
Normally I just carry a small backpack with a set of clothes only. Coz got stuff keep in SG, so I can zig zag very fast or run between immi

i will be stay in city centre area, as long as it is near to MRT if at singapore or near to bus station like larkin or jb sentral if at JB.