You do not slip when walking! The cleats are easy in and out. But the best, when you stop and put your foot on the ground you do not slip. The yellow contact points, keep your foot from slipping.
Decided not to take away a star because one set of the cleats had a bad screw. That screw did cause me to have to get a threading tool and chase the threads in one of my shoes, very scary. Don't buy these till they go on sale, the price has doubled on them in the last couple of years. I also tried the cheap chinese knockoffs, they worked ok but they only last a few weeks and the colored knobs on the cleats fall off after a few days...
The Shimano cleats wear as well as any brand I have ever had.
They have a large platform and I especially like the rubber walking tips on the cleat edges. It does wear off in time , but makes it easier to negotiate the cafe floor.
I tried the Shimano blue cleats for a while, and my knees hurt constantly. So when they wore out, I ordered the yellow cleats. My knee pain disappeared almost overnight. Plus they're easier to clip in, which is nice for city riding.