Yes, Clojure(script)'s REPL experience is really amazing. I don't think there are any general-purpose languages (beside Common Lisp) actively being used today that even come close in comparison. What's comes with Python, Ruby, C#, JavaScript, etc. - is a feeble attempt of an interactive shell, those aren't really REPLs. Even with Haskell I was really surprised to find out that you can't "send" any selected piece of Haskell code onto GHCI.
