I'm not very deep into Clojure - but I find that you end up having to use Java libraries which feels kinda clumsy. Java is a stateful language and Clojure has it's own ideas about how state is managed - so I'm never quite sure how to mix the two (based on some very limited experience... so I might be off-base)
I'm also not very deep into Clojure, but I've had the opposite experience so far. I've used it for some real-world projects and the most Java I've ever needed to pull in was a BufferedReader that I wrapped and forgot about.
