Cool! Java is coming soon for Config.ly. I think we view having many client libraries as an advantage over something like Spring Cloud Config that I believe only has Java implementation / HTTP -- since many folks have clients in several languages. I could be wrong, but I also don't think Spring Cloud Config has a fancy web UI with version history nor caching (so you can let PMs update copy instead of interrupting developers!).
The hope is that these and more features for Config.ly along with the fast integration will make it a no-brainer over rolling your own implementation as many folks do today.