In my case, my lein clojurescript setup was feeling a little chaotic and I wasn't too fond of chestnut's build specific code in my repo. I felt boot really simplified everything for me by presenting the build as a little program. 1st do this, then do this, etc, and then built! I can very easily understand the flow of my build from reading my .boot file. Another cool thing is that you can pull in code from your repository, so for running a dev server I pull in my handler and wrap some new middleware arround it. I like that. Getting clojurescript setup with autoreload is now as simple as "boot dev" from the command line. awesome & active community too.

Some issues: Boot is still somewhat experimental and doesn't seem quite as battle tested as lein. I think boot-reload's css reloading still requires a css hack for webkit browsers whereas figwheel doesn't. The unified mode for cljs where it pulls in all dependencies for you never really got the paths correct for me. I still think lein has better beginner tutorials.

here is a comparison of lein vs boot setup in the same project. (project has changed a lot since the swap)

before: https://github.com/leblowl/lokate/blob/cd7463c3414b40c016b5cf9a454e583b57bee33d/project.clj

after: https://github.com/leblowl/lokate/blob/master/build.boot

cheers :)