Drove a Kia Ceed in the UK three years ago and discovered it had this feature.
I say "discovered", because it wasn't mentioned to me and the first time the engine stopped was in stop-and-go traffic on the M25. I clued-in the second time the engine stopped and re-started when I touched the gear shift. I gave it a lot of thought for a while then forgot about it for the next two weeks as it did its job.
You'll get used to it.
If you do a lot of urban driving with frequent stops, I think it would be worthwhile. We spent most of our time in the rural areas and it was never obtrusive, nor did it get caught 'flat-footed. The car always went when it was supposed to.
Having said that, I only had the car for two weeks.
Best
Les