I’ve been using it for personal C++ projects for a few years (because I despise CMake) and find it quite pleasant. You do have to do things it’s way, though. Don’t expect it do adapt to your structure, you may need to rethink things slightly. Also don’t expect it to be a one stop build tool, I still use a simple makefile and “make init” to build dependencies that need to be compiled with something other than Tup, and then use Tup only to build my own sources.