I live in an accidental 15 minute city in Sweden and I really don't get the drama around them. They fantastic.
My small town is around half an hour away from the next nearest town and an hour away from the nearest city. We have everything we need in our little town. Cinema, bowling alley, swimming pool, healthcentre, ambulance/fire/police station, primary and secondary schools, adult education centre, library, supermarkets, diy shop, vets, library etc. You name it, we have it. Apart from guard towers on the exit roads to prevent people leaving, we don't have them.
I appreciate it even more now I can't drive.