It's good in that it's mature, cross platform, and it's python so you can build whatever you want on top of it. We use it at work for a relatively large codebas

It's good in that it's mature, cross platform, and it's python so you can build whatever you want on top of it. We use it at work for a relatively large codebase that targets multiple languages and architectures. I like python a lot better than cmake's syntax. It's nice to be able to define functions and importable modules to abstract away the ugly details of the build so that other developers can safely use them without being build system experts. Bazel is cool, but it's relatively immature. Last time I looked into it, you couldn't just install it easily. It's easy enough to make scons look like bazel. I suspect bazel handles very large codebases more efficiently.