Reading over previous reviews, I noticed a pattern: they get better over time - significantly so.
I remember when Kiva's first opened a few years ago. Service was clumsy (not knowing what to put on a specific sandwich, taking a long time to butter a simple bagel, etc.) and they ran out of bagels a few times.
But they quickly shifted gears and smoothed out any initial hiccups. Today, you can walk in during the morning or lunch rush and watch them churn out 20 bagel sandwiches in 5 minutes.
They will regularly drop in complimentary rugalahs into your lunch bag, are generous with portions and toppings and make, yes, the best bagels in the city.