I live in a master planned community (Daybreak, Utah), and while you can definitely scoff at the building quality (state of things everywhere right now, it's all done fast and with low quality materials), it's been fantastic, especially during the pandemic. The whole neighborhood is designed to be walkable, with parks, pools, trails, train stations, grocery stores and restaurants (added in the later phases, which are…
The bike trail is my favorite part. It connects to the major bike trails in my city, which allow me access to all the major sporting venues, downtown, major shopping centers, and job centers. I used to ride ~7 miles per day traveling from the office, and about 20 miles each weekend just going to do things I would have otherwise done via car. It allowed me to sell my car.
The light rail also makes things convenient if the weather isn't so great.
The odd thing is that nearly everyone in the community still drives everywhere, and some own multiple cars. Parking is a disaster and everyone complains about it, but these were all new builds and the buyers all should have known that parking would be limited.