I like its easy configs for lein commands which are very quick in execution time compare other tools that takes much more times as compared with lernuans command line system. The learning curve could be better but not bad at all if used properly. There should have been an option where i can directly import my java classes from external jars instead importing them through pom file or maven settings files(which really slows down things). This was what gave me some headache initially then realized how good this tool actually works when we need something done quickly without going into so many details about projects management etcetc It's very easy to start using with clojure. The only thing i dislike about leiningen is that sometimes it can be slow at loading libraries. I think this is due to clojurescript being loaded in the background which slows down the startup time. If you are new to clojure then leiningen will help you get started very quickly. You don't need any previous knowledge of clojure. Just download it and follow the instructions.