Go observe the feeders in Yishun and Woodlands.. 
Observed and as what some of the forum mates says, they are a total
disaster especially during morning peak hours.
I took 853 last Tuesday morning when I was on my day off. I have
to wait for at least 5 minutes before the rows of buses to clear
off the exit of Yishun bus interchange into Yishun Ave 2 before my
bus can even exit the interchange.
Most of the buses blocked the way and mostly bendy buses. One
856, one 812, one 806, one 800, one 969 and two single deckers 811
and 171 used up the whole strech of bus lane (Yishun Ave
2) outside the bus stop outside Northpoint and the one
behind Yishun Bus Interchange. One bendy bus 856, tried to cut into
the bus lane which were blocked by 3 bendy buses at the
bus lane, which result it blocking the way of an ambulance on the
2nd lane for a few minutes.
It was at least about 5 minutes later that these bendy buses
begin to clear the bus lane. Another single decker 169 also took
about 3 minutes before it can finally let its passengers alight. It
was chaotic and a few hornings were blasted at that time. I think
the situation was more or less the same when these buses went into
the alighting berths of Yishun interchange.
There is also a good write up on Woodlands interchange that the
jams caused by these buses by one person here before.
I guess those forumers who experience these everyday and
complain are right afterall. Bendy buses are not suitable for
Singapore bus operations. If SMRT really want and serious about
improving its bus services, then replace all the bendy buses with
double deckers as I believe these bendy buses are one of the
reasons that SMRT bus services are seriously delayed at times.
