We've been complaining day in and day out of the traffic and I believe that the U-turn system is the only solution that made a major effect in the reduction of traffic since the advent of the flyovers.
Of course, it is not a perfect system, but now I can't blame the MMDA for doing nothing to alleviate the traffic in MM. At least it reduced the number of stop lights that will definitely cause traffice jams. You just wished that a lot of drivers would know how to use the u-turns effectively. One major concern is that most drivers turn immediately once they reach the u-turn, thus when they reach the other lane, they have to wait for a break in the oncoming traffic whereas MMDA had already blocked off a lane for the cars managing the u-turn.